123222212133221 has 4 divisors (see below), whose sum is σ = 129707591719200. Its totient is φ = 116736832547244.

The previous prime is 123222212133037. The next prime is 123222212133227. The reversal of 123222212133221 is 122331212222321.

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 de Polignac number, because none of the positive numbers 2^k-123222212133221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123222212133227) 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, 3242689792961 + ... + 3242689792998.

It is an arithmetic number, because the mean of its divisors is an integer number (32426897929800).

Almost surely, 2^{123222212133221} is an apocalyptic number.

It is an amenable number.

123222212133221 is a deficient number, since it is larger than the sum of its proper divisors (6485379585979).

123222212133221 is an equidigital number, since it uses as much as digits as its factorization.

123222212133221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6485379585978.

The product of its digits is 6912, while the sum is 29.

Adding to 123222212133221 its reverse (122331212222321), we get a palindrome (245553424355542).

The spelling of 123222212133221 in words is "one hundred twenty-three trillion, two hundred twenty-two billion, two hundred twelve million, one hundred thirty-three thousand, two hundred twenty-one".