123131440444023 has 32 divisors (see below), whose sum is σ = 199127302993920. Its totient is φ = 74577492218880.

The previous prime is 123131440443971. The next prime is 123131440444031. The reversal of 123131440444023 is 320444044131321.

123131440444023 is a `hidden beast` number, since 1 + 2 + 3 + 131 + 440 + 44 + 40 + 2 + 3 = 666.

It is not a de Polignac number, because 123131440444023 - 2³⁴ = 123114260574839 is a prime.

It is a super-2 number, since 2×123131440444023² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123131440444093) 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 31 ways as a sum of consecutive naturals, for example, 131820490 + ... + 132751287.

It is an arithmetic number, because the mean of its divisors is an integer number (6222728218560).

Almost surely, 2^{123131440444023} is an apocalyptic number.

123131440444023 is a deficient number, since it is larger than the sum of its proper divisors (75995862549897).

123131440444023 is a wasteful number, since it uses less digits than its factorization.

123131440444023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264573364 (or 264573358 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

Adding to 123131440444023 its reverse (320444044131321), we get a palindrome (443575484575344).

The spelling of 123131440444023 in words is "one hundred twenty-three trillion, one hundred thirty-one billion, four hundred forty million, four hundred forty-four thousand, twenty-three".