331232223121 has 2 divisors, whose sum is σ = 331232223122. Its totient is φ = 331232223120.

The previous prime is 331232223097. The next prime is 331232223149. The reversal of 331232223121 is 121322232133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 291264216721 + 39968006400 = 539689^2 + 199920^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-331232223121 is a prime.

It is not a weakly prime, because it can be changed into another prime (331232223221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165616111560 + 165616111561.

It is an arithmetic number, because the mean of its divisors is an integer number (165616111561).

Almost surely, 2^331232223121 is an apocalyptic number.

It is an amenable number.

331232223121 is a deficient number, since it is larger than the sum of its proper divisors (1).

331232223121 is an equidigital number, since it uses as much as digits as its factorization.

331232223121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2592, while the sum is 25.

Adding to 331232223121 its reverse (121322232133), we get a palindrome (452554455254).

The spelling of 331232223121 in words is "three hundred thirty-one billion, two hundred thirty-two million, two hundred twenty-three thousand, one hundred twenty-one".