Fait général: 21140 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fait mathématique: 21140 is an unremarkable number.
Culture générale: 21140 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Date historique: November 16th is the day in 1979 that the first line of Bucharest Metro (Line M1) is opened from Timpuri Noi to Semănătoarea in Bucharest, Romania.