When I was 16, I thought of this palindrome?;

1221 2112 2112 1221 - 2112 1221 1221 2112 / 2112 1221 1221 2112 - 1221 2112 2112 1221

What is the next number.. It is 2.. But it gets infinitely longer.

On a Futurama episode, there was one multiplied by itself to make it 3D and when they'd say it out loud, God/A galaxy sends a time machine to earth - Then they go back in history and start stealing valuable stuff lol;