189
3over7
twentyeight thousand nine hundred twentyone FT deep
Network TwentyOne was created in 1989.
six hundred and twenty-one point nine
Twentyone and five tenths or twentyone and a half
0.42
icosikaihenagon
Twentyone follows twenty
no
a third of 21 is 7
Channel two-twentyone
A polygon with 21 sides is called an Icosagon.