4004420221 has 16 divisors (see below), whose sum is σ = 4402707840. Its totient is φ = 3625205760.

The previous prime is 4004420209. The next prime is 4004420237. The reversal of 4004420221 is 1220244004.

It is a cyclic number.

It is not a de Polignac number, because 4004420221 - 2⁹ = 4004419709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4004423221) 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, 517501 + ... + 525181.

It is an arithmetic number, because the mean of its divisors is an integer number (275169240).

Almost surely, 2^4004420221 is an apocalyptic number.

It is an amenable number.

4004420221 is a deficient number, since it is larger than the sum of its proper divisors (398287619).

4004420221 is a wasteful number, since it uses less digits than its factorization.

4004420221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8916.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 4004420221 is about 63280.4884699858. The cubic root of 4004420221 is about 1587.9855586724.

Adding to 4004420221 its reverse (1220244004), we get a palindrome (5224664225).

The spelling of 4004420221 in words is "four billion, four million, four hundred twenty thousand, two hundred twenty-one".