3131230312123 has 4 divisors (see below), whose sum is σ = 3131502817768. Its totient is φ = 3130957806480.

The previous prime is 3131230312117. The next prime is 3131230312127. The reversal of 3131230312123 is 3212130321313.

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-3131230312123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3131230312127) 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, 136235586 + ... + 136258567.

It is an arithmetic number, because the mean of its divisors is an integer number (782875704442).

Almost surely, 2^{3131230312123} is an apocalyptic number.

3131230312123 is a deficient number, since it is larger than the sum of its proper divisors (272505645).

3131230312123 is a wasteful number, since it uses less digits than its factorization.

3131230312123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272505644.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 3131230312123 its reverse (3212130321313), we get a palindrome (6343360633436).

The spelling of 3131230312123 in words is "three trillion, one hundred thirty-one billion, two hundred thirty million, three hundred twelve thousand, one hundred twenty-three".