Note that yotta now officially means 10^24 even in the context of
data processing. The prefixes
kilo,
mega,
giga,
tera,
peta,
exa,
zetta, yotta always refer to powers of 10.
To refer to powers of 2^10 (powers of 1024), use the new binary prefixes kibi, mebi, gibi, tebi, pebi, and exbi. That is as high as they go; there are no official prefixes "zebi" or "yobi".
These new prefixes were created in December 1998 by the International Electrotechnical Commission: see the node prefixes for binary multiples for fuller explanation.