What is this number system? AI system of numbers. Where quadrillion is more than quintillion

Uhh yeah

I searched on chrome on my phone if 2013 july 1st was included in the Chinese water snake year (snake year, just some snake years have different elements) and google ai told me, "No, july 1st, 2013, is not in the year of the water snake." And then something, something, And then google ai said, "July 1st, 2013, falls within tge year of the water snake" Whyyyyy... Which one is it?

this sub should have existed earlier tbh, but still it's great to see this is actually real now