Fatto generale: 12181 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 12181 is an unremarkable number.
Trivia: 12181 is an unremarkable number.
Data storica: May 7th is the day in 1994 that Edvard Munch's iconic painting The Scream is recovered undamaged after having been stolen from the National Gallery of Norway in February.