What is the max supply of Polkadot dot?

Excuse me, could you please explain something to me? I've been hearing a lot about Polkadot recently and I'm quite curious about its max supply. Could you tell me, what exactly is the maximum supply of Polkadot dot? I've been trying to research it, but the information seems a bit scattered. It would be great if you could clarify this for me. Is there a fixed limit to the number of Polkadot dot tokens that will ever be in circulation? Or is it subject to change based on certain conditions? I'm just trying to get a better understanding of this project and its economics. Thank you in advance for your help!