123311220312221 has 16 divisors (see below), whose sum is σ = 134277799075200. Its totient is φ = 112792329494208.

The previous prime is 123311220312209. The next prime is 123311220312223. The reversal of 123311220312221 is 122213022113321.

It is not a de Polignac number, because 123311220312221 - 2⁶ = 123311220312157 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 (123311220312223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 178721315 + ... + 179409951.

It is an arithmetic number, because the mean of its divisors is an integer number (8392362442200).

Almost surely, 2^{123311220312221} is an apocalyptic number.

It is an amenable number.

123311220312221 is a deficient number, since it is larger than the sum of its proper divisors (10966578762979).

123311220312221 is a wasteful number, since it uses less digits than its factorization.

123311220312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1013668.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 123311220312221 its reverse (122213022113321), we get a palindrome (245524242425542).

The spelling of 123311220312221 in words is "one hundred twenty-three trillion, three hundred eleven billion, two hundred twenty million, three hundred twelve thousand, two hundred twenty-one".