123404122403221 has 16 divisors (see below), whose sum is σ = 143902078927488. Its totient is φ = 104690665868800.

The previous prime is 123404122403197. The next prime is 123404122403239. The reversal of 123404122403221 is 122304221404321.

It is not a de Polignac number, because 123404122403221 - 2³³ = 123395532468629 is a prime.

It is a super-2 number, since 2×123404122403221² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123404122403521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5948322916 + ... + 5948343661.

It is an arithmetic number, because the mean of its divisors is an integer number (8993879932968).

Almost surely, 2^{123404122403221} is an apocalyptic number.

123404122403221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123404122403221 is a deficient number, since it is larger than the sum of its proper divisors (20497956524267).

123404122403221 is a wasteful number, since it uses less digits than its factorization.

123404122403221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11896666652.

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 123404122403221 its reverse (122304221404321), we get a palindrome (245708343807542).

The spelling of 123404122403221 in words is "one hundred twenty-three trillion, four hundred four billion, one hundred twenty-two million, four hundred three thousand, two hundred twenty-one".