123122113212121 has 24 divisors (see below), whose sum is σ = 125592838283160. Its totient is φ = 120677298587136.

The previous prime is 123122113212061. The next prime is 123122113212169. The reversal of 123122113212121 is 121212311221321.

It is a happy number.

It can be written as a sum of positive squares in 12 ways, for example, as 12185607842521 + 110936505369600 = 3490789^2 + 10532640^2 .

It is not a de Polignac number, because 123122113212121 - 2¹¹ = 123122113210073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123122113212521) 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, 5149601715 + ... + 5149625623.

It is an arithmetic number, because the mean of its divisors is an integer number (5233034928465).

Almost surely, 2^{123122113212121} is an apocalyptic number.

It is an amenable number.

123122113212121 is a deficient number, since it is larger than the sum of its proper divisors (2470725071039).

123122113212121 is an equidigital number, since it uses as much as digits as its factorization.

123122113212121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26685 (or 26512 counting only the distinct ones).

The product of its digits is 576, while the sum is 25.

Adding to 123122113212121 its reverse (121212311221321), we get a palindrome (244334424433442).

The spelling of 123122113212121 in words is "one hundred twenty-three trillion, one hundred twenty-two billion, one hundred thirteen million, two hundred twelve thousand, one hundred twenty-one".