331242323021 has 2 divisors, whose sum is σ = 331242323022. Its totient is φ = 331242323020.

The previous prime is 331242323017. The next prime is 331242323053. The reversal of 331242323021 is 120323242133.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 315894582025 + 15347740996 = 562045^2 + 123886^2 .

It is a cyclic number.

It is not a de Polignac number, because 331242323021 - 2² = 331242323017 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (331242323081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 165621161510 + 165621161511.

It is an arithmetic number, because the mean of its divisors is an integer number (165621161511).

Almost surely, 2^331242323021 is an apocalyptic number.

It is an amenable number.

331242323021 is a deficient number, since it is larger than the sum of its proper divisors (1).

331242323021 is an equidigital number, since it uses as much as digits as its factorization.

331242323021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 26.

Adding to 331242323021 its reverse (120323242133), we get a palindrome (451565565154).

The spelling of 331242323021 in words is "three hundred thirty-one billion, two hundred forty-two million, three hundred twenty-three thousand, twenty-one".