Mathematical fact: 1121 is the smallest number that can not be written using 12 copies of 12 and the operations +, –, ×, and ÷.
Trivia: 1121 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Historical date: January 25th is the day in 2006 that Mexican professional wrestler Juana Barraza is arrested in conjunction with the serial killing of at least 10 elderly women.