Fatto generale: 27123 is a number for which we're missing a fact (submit one to numbersapi at google mail!).
Fatto matematico: 27123 is an uninteresting number.
Trivia: 27123 is an uninteresting number.
Data storica: April 4th is the day in 1994 that Marc Andreessen and Jim Clark found Netscape Communications Corporation under the name "Mosaic Communications Corporation".