Fait général: 21871 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21871 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Culture générale: 21871 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 17th is the day in 1973 that the Athens Polytechnic Uprising against the military regime ends in a bloodshed in the Greek capital.