Fatto generale: 21051 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 21051 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Trivia: 21051 is a boring number.
Data storica: August 19th is the day in 1934 that the creation of the position Führer is approved by the German electorate with 89.9% of the popular vote.