Who Am I?

1. I am a 6 digit whole number.
   
   
2. Half of my digits are 2's.
   
   
3. Half of my digits are 1's.
   
   
4. I am divisible by 3.
   
   
5. I am an odd number.
   
   
6. I am divisible by 9.
   
   
7. My digits alternate.
   
   
8. I am greater than 200,000.
   
   
9. My hundreds digit is less than 2.
   
   
10. My tens digit is 2.
    
    

      Who am I?

Answer: I am 212,121.

The solution can be determined by clue 7.

Send any comments or questions to: David Pleacher