Fatto generale: 1321 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 1321 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 1321 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Data storica: August 13th is the day in 1536 that Buddhist monks from Kyōto's Enryaku-ji temple set fire to 21 Nichiren temples throughout in what will be known as the Tenbun Hokke Disturbance.