123231230112121 has 4 divisors (see below), whose sum is σ = 126097072672912. Its totient is φ = 120365387551332.

The previous prime is 123231230112103. The next prime is 123231230112173. The reversal of 123231230112121 is 121211032132321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 123231230112121 - 2⁷ = 123231230111993 is a prime.

It is a super-2 number, since 2×123231230112121² (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 (123231230112521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1432921280331 + ... + 1432921280416.

It is an arithmetic number, because the mean of its divisors is an integer number (31524268168228).

Almost surely, 2^{123231230112121} is an apocalyptic number.

It is an amenable number.

123231230112121 is a deficient number, since it is larger than the sum of its proper divisors (2865842560791).

123231230112121 is an equidigital number, since it uses as much as digits as its factorization.

123231230112121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2865842560790.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 123231230112121 its reverse (121211032132321), we get a palindrome (244442262244442).

The spelling of 123231230112121 in words is "one hundred twenty-three trillion, two hundred thirty-one billion, two hundred thirty million, one hundred twelve thousand, one hundred twenty-one".