123230311031 has 4 divisors (see below), whose sum is σ = 123239188512. Its totient is φ = 123221433552.

The previous prime is 123230310997. The next prime is 123230311051. The reversal of 123230311031 is 130113032321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130113032321 = 31 ⋅4197194591.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123230311031 is a prime.

It is a super-2 number, since 2×123230311031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 123230310994 and 123230311012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123230311051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4417886 + ... + 4445691.

It is an arithmetic number, because the mean of its divisors is an integer number (30809797128).

Almost surely, 2^123230311031 is an apocalyptic number.

123230311031 is a deficient number, since it is larger than the sum of its proper divisors (8877481).

123230311031 is an equidigital number, since it uses as much as digits as its factorization.

123230311031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8877480.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 123230311031 its reverse (130113032321), we get a palindrome (253343343352).

The spelling of 123230311031 in words is "one hundred twenty-three billion, two hundred thirty million, three hundred eleven thousand, thirty-one".