Fait général: 21343 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21343 is a boring number.
Culture générale: 21343 is a boring number.
Date historique: June 7th is the day in 1494 that Spain and Portugal sign the Treaty of Tordesillas which divides the New World between the two countries.