31310323123 has 4 divisors (see below), whose sum is σ = 31316313888. Its totient is φ = 31304332360.

The previous prime is 31310323111. The next prime is 31310323141. The reversal of 31310323123 is 32132301313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31310323123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31310323094 and 31310323103.

It is not an unprimeable number, because it can be changed into a prime (31310320123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2987536 + ... + 2997997.

It is an arithmetic number, because the mean of its divisors is an integer number (7829078472).

Almost surely, 2^31310323123 is an apocalyptic number.

31310323123 is a deficient number, since it is larger than the sum of its proper divisors (5990765).

31310323123 is an equidigital number, since it uses as much as digits as its factorization.

31310323123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5990764.

The product of its (nonzero) digits is 972, while the sum is 22.

Adding to 31310323123 its reverse (32132301313), we get a palindrome (63442624436).

The spelling of 31310323123 in words is "thirty-one billion, three hundred ten million, three hundred twenty-three thousand, one hundred twenty-three".