31311002123 has 2 divisors, whose sum is σ = 31311002124. Its totient is φ = 31311002122.

The previous prime is 31311002113. The next prime is 31311002167. The reversal of 31311002123 is 32120011313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31311002123 - 2³⁰ = 30237260299 is a prime.

It is not a weakly prime, because it can be changed into another prime (31311002113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655501061 + 15655501062.

It is an arithmetic number, because the mean of its divisors is an integer number (15655501062).

Almost surely, 2^31311002123 is an apocalyptic number.

31311002123 is a deficient number, since it is larger than the sum of its proper divisors (1).

31311002123 is an equidigital number, since it uses as much as digits as its factorization.

31311002123 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 31311002123 its reverse (32120011313), we get a palindrome (63431013436).

The spelling of 31311002123 in words is "thirty-one billion, three hundred eleven million, two thousand, one hundred twenty-three".