123255443120121 has 24 divisors (see below), whose sum is σ = 192443442838920. Its totient is φ = 75567535024896.

The previous prime is 123255443120119. The next prime is 123255443120141. The reversal of 123255443120121 is 121021344552321.

123255443120121 is a `hidden beast` number, since 1 + 2 + 3 + 2 + 5 + 5 + 443 + 1 + 201 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 17538715805625 + 105716727314496 = 4187925^2 + 10281864^2 .

It is not a de Polignac number, because 123255443120121 - 2¹ = 123255443120119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123255443120141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1958082516 + ... + 1958145461.

It is an arithmetic number, because the mean of its divisors is an integer number (8018476784955).

Almost surely, 2^{123255443120121} is an apocalyptic number.

It is an amenable number.

123255443120121 is a deficient number, since it is larger than the sum of its proper divisors (69187999718799).

123255443120121 is a wasteful number, since it uses less digits than its factorization.

123255443120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3916228265 (or 3916228262 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 123255443120121 its reverse (121021344552321), we get a palindrome (244276787672442).

The spelling of 123255443120121 in words is "one hundred twenty-three trillion, two hundred fifty-five billion, four hundred forty-three million, one hundred twenty thousand, one hundred twenty-one".