Is it illegal to own a $100 000 dollar bill?

Excuse me, I've come across some information that suggests the existence of $100,000 dollar bills, and I'm curious about their legality. Could you please clarify if it's against the law for an individual to possess such a high denomination note? I'm under the impression that most modern currencies don't include such high-value bills due to security concerns and inflation, so I'm a bit confused about the matter. I would greatly appreciate your insights on this matter.