12104013021 has 4 divisors (see below), whose sum is σ = 16138684032. Its totient is φ = 8069342012.

The previous prime is 12104012933. The next prime is 12104013029. The reversal of 12104013021 is 12031040121.

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 cyclic number.

It is not a de Polignac number, because 12104013021 - 2²⁷ = 11969795293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12104013029) 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, 2017335501 + ... + 2017335506.

It is an arithmetic number, because the mean of its divisors is an integer number (4034671008).

Almost surely, 2^12104013021 is an apocalyptic number.

It is an amenable number.

12104013021 is a deficient number, since it is larger than the sum of its proper divisors (4034671011).

12104013021 is an equidigital number, since it uses as much as digits as its factorization.

12104013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4034671010.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 12104013021 its reverse (12031040121), we get a palindrome (24135053142).

The spelling of 12104013021 in words is "twelve billion, one hundred four million, thirteen thousand, twenty-one".