Satillionaire

Millionaire and billionaire tell us the number, not the currency. On the other hand, satoshinaire, or satillionaire - as suggested in the other comment, only tell us the asset, but not the number.

Actually, if the bitcoin standard became a thing, just millionaire and billionaire would do, as fiat will be irrelevant, but until then a proper substitutes would be milliosatter and billiosatter.