123404110103421 has 24 divisors (see below), whose sum is σ = 211259711126464. Its totient is φ = 70516634343840.

The previous prime is 123404110103387. The next prime is 123404110103453. The reversal of 123404110103421 is 124301011404321.

It is a happy number.

123404110103421 is a `hidden beast` number, since 1 + 2 + 3 + 404 + 110 + 103 + 42 + 1 = 666.

It is not a de Polignac number, because 123404110103421 - 2⁴³ = 114608017081213 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123404110103321) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36273987160 + ... + 36273990561.

Almost surely, 2^{123404110103421} is an apocalyptic number.

It is an amenable number.

123404110103421 is a deficient number, since it is larger than the sum of its proper divisors (87855601023043).

123404110103421 is an frugal number, since it uses more digits than its factorization.

123404110103421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72547977743 (or 72547977731 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

Adding to 123404110103421 its reverse (124301011404321), we get a palindrome (247705121507742).

The spelling of 123404110103421 in words is "one hundred twenty-three trillion, four hundred four billion, one hundred ten million, one hundred three thousand, four hundred twenty-one".