Hi there!
Yes, sextillion is a real number, and a BIG one!
Did you know that sextillion has TWENTY-ONE zeros? Yes, twenty-one!
It looks something like this:
⇒ 1,000,000,000,000,000,000,000
Really big, right?
⇒ Sextillion, for many of you who may be watching, isn't really considered a joke because of part of its root word. Its just a number. :)
Hope this helps!
Message me if you need anything else! I'd be happy to help! :D