3121320232831 has 2 divisors, whose sum is σ = 3121320232832. Its totient is φ = 3121320232830.

The previous prime is 3121320232829. The next prime is 3121320232853. The reversal of 3121320232831 is 1382320231213.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3121320232831 - 2¹ = 3121320232829 is a prime.

It is a super-2 number, since 2×3121320232831² (a number of 26 digits) contains 22 as substring.

Together with 3121320232829, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 3121320232793 and 3121320232802.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121320202831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560660116415 + 1560660116416.

It is an arithmetic number, because the mean of its divisors is an integer number (1560660116416).

Almost surely, 2^{3121320232831} is an apocalyptic number.

3121320232831 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121320232831 is an equidigital number, since it uses as much as digits as its factorization.

3121320232831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 3121320232831 in words is "three trillion, one hundred twenty-one billion, three hundred twenty million, two hundred thirty-two thousand, eight hundred thirty-one".