31310121023 has 2 divisors, whose sum is σ = 31310121024. Its totient is φ = 31310121022.

The previous prime is 31310120917. The next prime is 31310121047. The reversal of 31310121023 is 32012101313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31310121023 - 2¹⁰ = 31310119999 is a prime.

It is a zygodrome in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 31310120992 and 31310121010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31310121823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15655060511 + 15655060512.

It is an arithmetic number, because the mean of its divisors is an integer number (15655060512).

Almost surely, 2^31310121023 is an apocalyptic number.

31310121023 is a deficient number, since it is larger than the sum of its proper divisors (1).

31310121023 is an equidigital number, since it uses as much as digits as its factorization.

31310121023 is an evil number, because the sum of its binary digits is even.

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

Adding to 31310121023 its reverse (32012101313), we get a palindrome (63322222336).

The spelling of 31310121023 in words is "thirty-one billion, three hundred ten million, one hundred twenty-one thousand, twenty-three".