123131012303123 has 16 divisors (see below), whose sum is σ = 135228011073120. Its totient is φ = 111187071878400.

The previous prime is 123131012303093. The next prime is 123131012303147. The reversal of 123131012303123 is 321303210131321.

It is a cyclic number.

It is not a de Polignac number, because 123131012303123 - 2⁶ = 123131012303059 is a prime.

It is a super-2 number, since 2×123131012303123² (a number of 29 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 = 123131012303092 and 123131012303101.

It is not an unprimeable number, because it can be changed into a prime (123131012303153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61851908 + ... + 63811601.

It is an arithmetic number, because the mean of its divisors is an integer number (8451750692070).

Almost surely, 2^{123131012303123} is an apocalyptic number.

123131012303123 is a deficient number, since it is larger than the sum of its proper divisors (12096998769997).

123131012303123 is a wasteful number, since it uses less digits than its factorization.

123131012303123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125664118.

The product of its (nonzero) digits is 1944, while the sum is 26.

Adding to 123131012303123 its reverse (321303210131321), we get a palindrome (444434222434444).

The spelling of 123131012303123 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, twelve million, three hundred three thousand, one hundred twenty-three".