Only until the Epoch Time is 1919191919! ()
Here are some other cool epoch times: 1777777777 1800000000 1818181818 1888888888 1900000000 1999999999 2000000000 202020202020 2100000000 2121212121 2147485547
A quick idea by Chris Rowe follow him on Twitter @chrisrowe
Extended beyond 1234567890 by Daniel Geymayer