Fatto generale: 4212 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 4212 is an uninteresting number.
Trivia: 4212 is a boring number.
Data storica: July 13th is the day in 1260 that the Livonian Order suffers its greatest defeat in the 13th century in the Battle of Durbe against the Grand Duchy of Lithuania.