312331022023021 has 2 divisors, whose sum is σ = 312331022023022. Its totient is φ = 312331022023020.

The previous prime is 312331022023019. The next prime is 312331022023051. The reversal of 312331022023021 is 120320220133213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 256963657167396 + 55367364855625 = 16030086^2 + 7440925^2 .

It is a cyclic number.

It is not a de Polignac number, because 312331022023021 - 2¹ = 312331022023019 is a prime.

Together with 312331022023019, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312331022023051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156165511011510 + 156165511011511.

It is an arithmetic number, because the mean of its divisors is an integer number (156165511011511).

Almost surely, 2^{312331022023021} is an apocalyptic number.

It is an amenable number.

312331022023021 is a deficient number, since it is larger than the sum of its proper divisors (1).

312331022023021 is an equidigital number, since it uses as much as digits as its factorization.

312331022023021 is an odious number, because the sum of its binary digits is odd.

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

Adding to 312331022023021 its reverse (120320220133213), we get a palindrome (432651242156234).

The spelling of 312331022023021 in words is "three hundred twelve trillion, three hundred thirty-one billion, twenty-two million, twenty-three thousand, twenty-one".