323131010021 has 2 divisors, whose sum is σ = 323131010022. Its totient is φ = 323131010020.

The previous prime is 323131010003. The next prime is 323131010023. The reversal of 323131010021 is 120010131323.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 302075548996 + 21055461025 = 549614^2 + 145105^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-323131010021 is a prime.

Together with 323131010023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (323131010023) 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, 161565505010 + 161565505011.

It is an arithmetic number, because the mean of its divisors is an integer number (161565505011).

Almost surely, 2^323131010021 is an apocalyptic number.

It is an amenable number.

323131010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

323131010021 is an equidigital number, since it uses as much as digits as its factorization.

323131010021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 323131010021 its reverse (120010131323), we get a palindrome (443141141344).

The spelling of 323131010021 in words is "three hundred twenty-three billion, one hundred thirty-one million, ten thousand, twenty-one".