331230101021 has 2 divisors, whose sum is σ = 331230101022. Its totient is φ = 331230101020.

The previous prime is 331230101011. The next prime is 331230101057. The reversal of 331230101021 is 120101032133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 195722184025 + 135507916996 = 442405^2 + 368114^2 .

It is a cyclic number.

It is not a de Polignac number, because 331230101021 - 2¹⁰ = 331230099997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331230101011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165615050510 + 165615050511.

It is an arithmetic number, because the mean of its divisors is an integer number (165615050511).

Almost surely, 2^331230101021 is an apocalyptic number.

It is an amenable number.

331230101021 is a deficient number, since it is larger than the sum of its proper divisors (1).

331230101021 is an equidigital number, since it uses as much as digits as its factorization.

331230101021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 331230101021 its reverse (120101032133), we get a palindrome (451331133154).

The spelling of 331230101021 in words is "three hundred thirty-one billion, two hundred thirty million, one hundred one thousand, twenty-one".