Answer :
The answer is 11.
11 is a prime number.
1 is a prime number
And the it's two digits ( 1 and 1) sum up to 2 which is also a prime number.
Hope that's correct and it help
11 is a prime number.
1 is a prime number
And the it's two digits ( 1 and 1) sum up to 2 which is also a prime number.
Hope that's correct and it help