Fait général: 1211 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 1211 is the smallest number that ends an arithmetic progression of 9 numbers with the same prime signature.
Culture générale: 1211 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: April 25th is the day in 1644 that the Chongzhen Emperor, the last Emperor of Ming Dynasty China, commits suicide during a peasant rebellion led by Li Zicheng.