Fatto generale: 12158 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 12158 is an unremarkable number.
Trivia: 12158 is an unremarkable number.
Data storica: April 14th is the day in 2002 that Venezuelan President Hugo Chavez returns to office two days after being ousted and arrested by the country's military.