123310123131 has 24 divisors (see below), whose sum is σ = 179228516400. Its totient is φ = 75373823616.

The previous prime is 123310123109. The next prime is 123310123163. The reversal of 123310123131 is 131321013321.

It is a happy number.

It is not a de Polignac number, because 123310123131 - 2¹⁰ = 123310122107 is a prime.

It is a super-2 number, since 2×123310123131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123310123098 and 123310123107.

It is not an unprimeable number, because it can be changed into a prime (123310123171) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 740616 + ... + 891701.

It is an arithmetic number, because the mean of its divisors is an integer number (7467854850).

Almost surely, 2^123310123131 is an apocalyptic number.

123310123131 is a deficient number, since it is larger than the sum of its proper divisors (55918393269).

123310123131 is a wasteful number, since it uses less digits than its factorization.

123310123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632495 (or 1632482 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 123310123131 its reverse (131321013321), we get a palindrome (254631136452).

The spelling of 123310123131 in words is "one hundred twenty-three billion, three hundred ten million, one hundred twenty-three thousand, one hundred thirty-one".