How many 13-digits number are Palindromic numbers

How many 13-digits number are Palindromic numbers? A Palindromic number reads the same forward and backward, example 1234567654321.

This problem repeats another one in the library (at most with different numbers), so it's left out of browsing.

AQuA-RAT — Algebra Question Answering with Rationales (Ling et al., DeepMind, 2017) · train #84902