12340...04321 (111-digits)

This number is a prime.

                               1 2340000000 0000000000 0000000000 0000000000
0000000000 0000000000 0000000000 0000000000 0000000000 0000000000 0000004321

A palindromic prime of the form 1234*10^(k+4)+4321. [Bobbitt]