Don’t know where this is from, but their phrasing is annoying. Ok, here goes.
When it’s talking about the square being palindromic, it means it is the same forwards and backwards, e.g. 1794683864971. As for the number base stuff, I have no clue. Speaking of which, what language are you using? It seems like base code, which is only really useful to my brethren, the Hackers.
Sorry I couldn’t be much help! If you reply w/ more info, I’ll try to follow up.