123112121322121 has 8 divisors (see below), whose sum is σ = 124371164923200. Its totient is φ = 121854304265232.

The previous prime is 123112121322107. The next prime is 123112121322167. The reversal of 123112121322121 is 121223121211321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 123112121322121 - 2¹⁷ = 123112121191049 is a prime.

It is a super-2 number, since 2×123112121322121² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123112121322101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 306434275 + ... + 306835768.

It is an arithmetic number, because the mean of its divisors is an integer number (15546395615400).

Almost surely, 2^{123112121322121} is an apocalyptic number.

It is an amenable number.

123112121322121 is a deficient number, since it is larger than the sum of its proper divisors (1259043601079).

123112121322121 is a wasteful number, since it uses less digits than its factorization.

123112121322121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 613272095.

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

Adding to 123112121322121 its reverse (121223121211321), we get a palindrome (244335242533442).

The spelling of 123112121322121 in words is "one hundred twenty-three trillion, one hundred twelve billion, one hundred twenty-one million, three hundred twenty-two thousand, one hundred twenty-one".