123204110421 has 32 divisors (see below), whose sum is σ = 202533758208. Its totient is φ = 65010816000.

The previous prime is 123204110363. The next prime is 123204110443. The reversal of 123204110421 is 124011402321.

It is not a de Polignac number, because 123204110421 - 2⁶ = 123204110357 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123204110621) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3236830 + ... + 3274671.

It is an arithmetic number, because the mean of its divisors is an integer number (6329179944).

Almost surely, 2^123204110421 is an apocalyptic number.

It is an amenable number.

123204110421 is a deficient number, since it is larger than the sum of its proper divisors (79329647787).

123204110421 is a wasteful number, since it uses less digits than its factorization.

123204110421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6511581.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 123204110421 its reverse (124011402321), we get a palindrome (247215512742).

The spelling of 123204110421 in words is "one hundred twenty-three billion, two hundred four million, one hundred ten thousand, four hundred twenty-one".