AEI INCOME & GROWTH FUND XXI LTD PARTNERSHIP
COMPANY
10-K
FORM
2026-03-27
FILING DATE
2025-12-31
FY PERIOD END
325
FACTS
SIC 6500
Filing Software CompSci
CIK 0000931755
Taxonomy US GAAP 2025  
SIC 6500
CIK 0000931755
Filing Software CompSci
Taxonomy US GAAP 2025  
Standard Concepts
154
Extended Concepts
41
21%
Extended Concepts
Errors
0
What are errors?
What are errors?
Indicate problems with an XBRL formatted filing that are sufficient grounds for SEC rejection of the XBRL portion of the filing.
Data Quality Errors
0
What are data quality errors?
What are data quality errors?
Indicate areas that may not meet the standards set by the Data Quality Committee (DQC), and may reveal areas where the XBRL can be improved.
WARNING
In "Statement of Changes in Partners' Capital", fact us-gaap:PartnersCapital with value 8101 and preferred label http://www.xbrl.org/2003/role/periodStartLabel, was not shown because there are no facts in a duration starting at 2022-12-31. Change the preferred label role or add facts.
WARNING
In "Statement of Changes in Partners' Capital", fact us-gaap:PartnersCapital with value 8101 and preferred label http://www.xbrl.org/2003/role/periodEndLabel, was not shown because there are no facts in a duration ending at 2022-12-31. Change the preferred label role or add facts.
WARNING
In "Statement of Changes in Partners' Capital", fact us-gaap:PartnersCapital with value 10210015 and preferred label http://www.xbrl.org/2003/role/periodStartLabel, was not shown because there are no facts in a duration starting at 2022-12-31. Change the preferred label role or add facts.
WARNING
In "Statement of Changes in Partners' Capital", fact us-gaap:PartnersCapital with value 10210015 and preferred label http://www.xbrl.org/2003/role/periodEndLabel, was not shown because there are no facts in a duration ending at 2022-12-31. Change the preferred label role or add facts.
WARNING
In "Statement of Changes in Partners' Capital", fact us-gaap:LimitedPartnersCapitalAccountUnitsOutstanding with value 17076.71 and preferred label http://www.xbrl.org/2003/role/periodStartLabel, was not shown because there are no facts in a duration starting at 2022-12-31. Change the preferred label role or add facts.
WARNING
In "Statement of Changes in Partners' Capital", fact us-gaap:LimitedPartnersCapitalAccountUnitsOutstanding with value 17076.71 and preferred label http://www.xbrl.org/2003/role/periodEndLabel, was not shown because there are no facts in a duration ending at 2022-12-31. Change the preferred label role or add facts.
WARNING
us-gaap:PartnersCapital in context c7 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:GeneralPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/ConsolidatedBalanceSheet'}.
WARNING
us-gaap:PartnersCapital in context c8 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:LimitedPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/ConsolidatedBalanceSheet'}.
WARNING
us-gaap:LimitedPartnersCapitalAccountUnitsOutstanding in context c8 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:LimitedPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/OrganizationDetails'}.
WARNING
us-gaap:DistributionMadeToLimitedPartnerCashDistributionsDeclared in context c10 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:GeneralPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/PartnersCapitalDetails'}.
WARNING
us-gaap:DistributionMadeToLimitedPartnerCashDistributionsDeclared in context c11 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:LimitedPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/PartnersCapitalDetails'}.
WARNING
us-gaap:ProfitLoss in context c10 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:GeneralPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ConsolidatedCashFlow', 'http://aeifunds.com/role/FederalTaxableIncomeReconciliationTable', 'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/ConsolidatedIncomeStatement'}.
WARNING
us-gaap:ProfitLoss in context c11 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:LimitedPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ConsolidatedCashFlow', 'http://aeifunds.com/role/FederalTaxableIncomeReconciliationTable', 'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/ConsolidatedIncomeStatement'}.
WARNING
us-gaap:PartnersCapitalAccountRedemptions in context c16 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:GeneralPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/PartnersCapitalDetails'}.
WARNING
us-gaap:PartnersCapitalAccountRedemptions in context c17 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:LimitedPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/PartnersCapitalDetails'}.
WARNING
us-gaap:PartnersCapitalAccountUnitsRedeemed in context c17 was not selected in any presentation group. Ensure that its dimension members {'us-gaap:PartnerTypeOfPartnersCapitalAccountAxis': 'us-gaap:LimitedPartnerMember'} are presented in presentation roles {'http://aeifunds.com/role/ShareholdersEquityType2or3', 'http://aeifunds.com/role/PartnersCapitalDetails'}.
INFO
(Info xbrl.5.2.4.2.1) Presentation relationship from us-gaap:AcquiredFiniteLivedIntangibleAssetsLineItems to us-gaap:AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife in link role http://aeifunds.com/role/AcquiredLeaseIntangiblesTable_Parentheticals has empty preferredLabel http://www.xbrl.org/2003/role/terseLabel
INFO
(Info xbrl.5.2.4.2.1) Presentation relationship from aei21:OtherReceivableYearfive to us-gaap:OtherReceivables in link role http://aeifunds.com/role/FutureMinimumRentPaymentsTable has empty preferredLabel http://www.xbrl.org/2003/role/terseLabel
What are possible issues?
What are possible issues?
Indicate areas of interest as to the quality of an XBRL formatted filing, and in some cases reveal opportunities for improvement of the XBRL filing.