12041100021 has 4 divisors (see below), whose sum is σ = 16054800032. Its totient is φ = 8027400012.

The previous prime is 12041099989. The next prime is 12041100031. The reversal of 12041100021 is 12000114021.

It is a happy number.

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 not a de Polignac number, because 12041100021 - 2⁵ = 12041099989 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 (12041100031) 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, 2006850001 + ... + 2006850006.

It is an arithmetic number, because the mean of its divisors is an integer number (4013700008).

Almost surely, 2^12041100021 is an apocalyptic number.

It is an amenable number.

12041100021 is a deficient number, since it is larger than the sum of its proper divisors (4013700011).

12041100021 is an equidigital number, since it uses as much as digits as its factorization.

12041100021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4013700010.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 12041100021 its reverse (12000114021), we get a palindrome (24041214042).

The spelling of 12041100021 in words is "twelve billion, forty-one million, one hundred thousand, twenty-one".