Fait général: 21220 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21220 is an uninteresting number.
Culture générale: 21220 is an uninteresting number.
Date historique: February 4th is the day in 1846 that the first Mormon pioneers make their exodus from Nauvoo, Illinois, westward towards Utah Territory.