How many ip address with ipv6?

2 to the power of 128 = 340,282,366,920,938,463,463,374,607,431,768,211,456 IP addresses.
Steve Leibson says:

How big is that?  Well, several web sites say there are 1.33 x 10⁵⁰ atoms in the earth.  That’s way bigger than 2¹²⁰.  But to make it come closer, I computed the number of atoms on the surface of the earth.  That turns out to be 1.26 x 10³⁴ atoms.  2¹²⁰ is 1.33 x 10³⁶, which is still bigger by 105 times.

So we could assign an IPV6 address to EVERY ATOM ON THE SURFACE OF THE EARTH, and still have enough addresses left to do another 100+ earths.  It isn’t remotely likely that we’ll run out of IPV6 addresses at any time in the future

We can tag-ipv6 everything, then ipv6 are free?