Belphegor's Prime

Interesting Number

Belphegor's prime is the palindromic prime:

$1000000000000066600000000000001$

It has:

$666$: the Number of the Beast in its center

Unlucky number $13$ zeroes either side of the $666$

$31$ digits, which is not only itself prime, but backwards is $13$ which is also prime.

Linguistic Note

The name Belphegor's Prime refers to Belphegor, one of the Seven Princes of Hell, whose particular specialty was helping people make ingenious inventions and discoveries.