Brain Game: Dragnet

It's Friday. I work here. This is my Brain Game:

What's the next number in this series?

2, 3, 10, 12, 13, 20, 21, ?

Here is my SOLUTION.

MY SOLUTION:

22

They're increasingly larger numbers that begin with the letter "t" - two, three, ten, twelve, thirteen, twenty, twenty-one, so... twenty-two.