Exactly 21 millions, take a look at the bitcoin wiki, you will find some interesting informations:
http://it.wikipedia.org/wiki/Bitcoin
http://it.wikipedia.org/wiki/Bitcoin
keep in mind, however, that this hard limit can always be changed by altering the source code, should devs decide to do that. in the case of such a fork, it would be up to the miners to prevent the new fork from developing, and to keep the old code intact.
highly unlikely, but just throwing it out there.
We will see I highly doubt they would do a fork at this point..... but guess you never know. I think you have a better chance winning lottery
