123211131222121 has 8 divisors (see below), whose sum is σ = 123320307254144. Its totient is φ = 123101969942160.

The previous prime is 123211131222073. The next prime is 123211131222133. The reversal of 123211131222121 is 121222131112321.

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 123211131222121 - 2⁷ = 123211131221993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123211131922121) 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, 13057306 + ... + 20418508.

It is an arithmetic number, because the mean of its divisors is an integer number (15415038406768).

Almost surely, 2^{123211131222121} is an apocalyptic number.

It is an amenable number.

123211131222121 is a deficient number, since it is larger than the sum of its proper divisors (109176032023).

123211131222121 is a wasteful number, since it uses less digits than its factorization.

123211131222121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7376031.

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

Adding to 123211131222121 its reverse (121222131112321), we get a palindrome (244433262334442).

The spelling of 123211131222121 in words is "one hundred twenty-three trillion, two hundred eleven billion, one hundred thirty-one million, two hundred twenty-two thousand, one hundred twenty-one".