Fait général: 21220 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21220 is a boring number.
Culture générale: 21220 is an unremarkable number.
Date historique: February 4th is the day in 2003 that the Federal Republic of Yugoslavia is officially renamed to Serbia and Montenegro and adopts a new constitution.