Fait général: 21916 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21916 is a boring number.
Culture générale: 21916 is a boring number.
Date historique: January 1st is the day in 1962 that Western Samoa achieves independence from New Zealand; its name is changed to the Independent State of Western Samoa.