123031431553123 has 4 divisors (see below), whose sum is σ = 123069044345008. Its totient is φ = 122993818761240.

The previous prime is 123031431553103. The next prime is 123031431553153. The reversal of 123031431553123 is 321355134130321.

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-123031431553123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123031431553103) 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, 18806391036 + ... + 18806397577.

It is an arithmetic number, because the mean of its divisors is an integer number (30767261086252).

Almost surely, 2^{123031431553123} is an apocalyptic number.

123031431553123 is a deficient number, since it is larger than the sum of its proper divisors (37612791885).

123031431553123 is an equidigital number, since it uses as much as digits as its factorization.

123031431553123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37612791884.

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 123031431553123 its reverse (321355134130321), we get a palindrome (444386565683444).

The spelling of 123031431553123 in words is "one hundred twenty-three trillion, thirty-one billion, four hundred thirty-one million, five hundred fifty-three thousand, one hundred twenty-three".