Fatto generale: 12086 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 12086 is an unremarkable number.
Trivia: 12086 is an unremarkable number.
Data storica: February 1st is the day in 1968 that the New York Central Railroad and the Pennsylvania Railroad are merged to form the ill-fated Penn Central Transportation.