Fatto generale: 21118 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21118 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21118 is a boring number.
Data storica: October 25th is the day in 1924 that the forged Zinoviev Letter is published in the Daily Mail, wrecking the British Labour Party's hopes of re-election.