1044421021 has 16 divisors (see below), whose sum is σ = 1220655744. Its totient is φ = 875070144.

The previous prime is 1044420997. The next prime is 1044421039. The reversal of 1044421021 is 1201244401.

1044421021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1044421021 - 2⁵ = 1044420989 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1044421021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1044422021) 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, 97686 + ... + 107848.

It is an arithmetic number, because the mean of its divisors is an integer number (76290984).

Almost surely, 2^1044421021 is an apocalyptic number.

It is an amenable number.

1044421021 is a deficient number, since it is larger than the sum of its proper divisors (176234723).

1044421021 is a wasteful number, since it uses less digits than its factorization.

1044421021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1044421021 is about 32317.5033225031. The cubic root of 1044421021 is about 1014.5930150221.

Adding to 1044421021 its reverse (1201244401), we get a palindrome (2245665422).

The spelling of 1044421021 in words is "one billion, forty-four million, four hundred twenty-one thousand, twenty-one".