Fait général: 2120 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 2120 is the number of ways to stack 16 pennies in a line so that each penny lies on the table or on two pennies.
Culture générale: 2120 is an uninteresting number.
Date historique: October 20th is the day in 1991 that the Oakland Hills firestorm kills 25 and destroys 3,469 homes and apartments, causing more than $2 billion in damage.