All IOTA's which will ever exist have been created with the genesis transaction. This means that the total supply of IOTA's will always stay the same and you cannot "mine" IOTA's. Therefore keep in mind, if you do Proof of Work in IOTA you are not generating new IOTA tokens, you're simply verifying other transactions.
The total supply of IOTA is
(3^33-1) / 2, which equals to a total number of IOTA's of
2779530283277761. IOTA is specifically designed for machines, so this high supply makes IOTA optimal for tiny nanotransactions while still keeping efficiency in mind. It also nicely fits into the
WORK IN PROGRESS!
This page is currently being worked on and improved. If you have any questions, feel free to submit them via https://iota.readme.io/discuss