12104220021 has 16 divisors (see below), whose sum is σ = 16178467200. Its totient is φ = 8049749760.

The previous prime is 12104220017. The next prime is 12104220049. The reversal of 12104220021 is 12002240121.

It is not a de Polignac number, because 12104220021 - 2² = 12104220017 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12104220001) 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, 4097481 + ... + 4100433.

It is an arithmetic number, because the mean of its divisors is an integer number (1011154200).

Almost surely, 2^12104220021 is an apocalyptic number.

It is an amenable number.

12104220021 is a deficient number, since it is larger than the sum of its proper divisors (4074247179).

12104220021 is a wasteful number, since it uses less digits than its factorization.

12104220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5836.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12104220021 its reverse (12002240121), we get a palindrome (24106460142).

The spelling of 12104220021 in words is "twelve billion, one hundred four million, two hundred twenty thousand, twenty-one".