12044556021 has 8 divisors (see below), whose sum is σ = 16062277504. Its totient is φ = 8028269280.

The previous prime is 12044555989. The next prime is 12044556023. The reversal of 12044556021 is 12065544021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12044556021 - 2⁵ = 12044555989 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12044556021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12044556023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 338941 + ... + 372786.

It is an arithmetic number, because the mean of its divisors is an integer number (2007784688).

Almost surely, 2^12044556021 is an apocalyptic number.

It is an amenable number.

12044556021 is a deficient number, since it is larger than the sum of its proper divisors (4017721483).

12044556021 is an equidigital number, since it uses as much as digits as its factorization.

12044556021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 717371.

The product of its (nonzero) digits is 9600, while the sum is 30.

The spelling of 12044556021 in words is "twelve billion, forty-four million, five hundred fifty-six thousand, twenty-one".