If `sumn=420` then `sumn^2` is divided by largest prime number which is

If sumn=210 , then sumn^2=

If sumn=55 then sumn^2=

(iv) There is no largest prime number.

Cube root of a number when divided by the smallest prime number gives square of the smallest prime number, find the number.

The sum of the squares of the digits of the largest prime number in two digits is