2004004221 has 16 divisors (see below), whose sum is σ = 2688884736. Its totient is φ = 1327590576.

The previous prime is 2004004199. The next prime is 2004004241. The reversal of 2004004221 is 1224004002.

It is not a de Polignac number, because 2004004221 - 2¹¹ = 2004002173 is a prime.

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 2004004221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2004004241) 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, 322086 + ... + 328248.

It is an arithmetic number, because the mean of its divisors is an integer number (168055296).

Almost surely, 2^2004004221 is an apocalyptic number.

It is an amenable number.

2004004221 is a deficient number, since it is larger than the sum of its proper divisors (684880515).

2004004221 is a wasteful number, since it uses less digits than its factorization.

2004004221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6832.

The product of its (nonzero) digits is 128, while the sum is 15.

The square root of 2004004221 is about 44766.1057162671. The cubic root of 2004004221 is about 1260.7613230919.

Adding to 2004004221 its reverse (1224004002), we get a palindrome (3228008223).

The spelling of 2004004221 in words is "two billion, four million, four thousand, two hundred twenty-one".