123131313023 has 4 divisors (see below), whose sum is σ = 124326762768. Its totient is φ = 121935863280.

The previous prime is 123131313007. The next prime is 123131313029. The reversal of 123131313023 is 320313131321.

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

It is a cyclic number.

It is not a de Polignac number, because 123131313023 - 2⁴ = 123131313007 is a prime.

It is a super-2 number, since 2×123131313023² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 123131313023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131313029) 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, 597724718 + ... + 597724923.

It is an arithmetic number, because the mean of its divisors is an integer number (31081690692).

Almost surely, 2^123131313023 is an apocalyptic number.

123131313023 is a deficient number, since it is larger than the sum of its proper divisors (1195449745).

123131313023 is a wasteful number, since it uses less digits than its factorization.

123131313023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1195449744.

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

Adding to 123131313023 its reverse (320313131321), we get a palindrome (443444444344).

The spelling of 123131313023 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred thirteen thousand, twenty-three".