31313123123 has 12 divisors (see below), whose sum is σ = 33437634432. Its totient is φ = 29316823680.

The previous prime is 31313123119. The next prime is 31313123129. The reversal of 31313123123 is 32132131313.

It is not a de Polignac number, because 31313123123 - 2² = 31313123119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31313123129) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 228440 + ... + 338837.

It is an arithmetic number, because the mean of its divisors is an integer number (2786469536).

Almost surely, 2^31313123123 is an apocalyptic number.

31313123123 is a deficient number, since it is larger than the sum of its proper divisors (2124511309).

31313123123 is a wasteful number, since it uses less digits than its factorization.

31313123123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 567502 (or 567485 counting only the distinct ones).

The product of its digits is 972, while the sum is 23.

Adding to 31313123123 its reverse (32132131313), we get a palindrome (63445254436).

The spelling of 31313123123 in words is "thirty-one billion, three hundred thirteen million, one hundred twenty-three thousand, one hundred twenty-three".