4404220021 has 4 divisors (see below), whose sum is σ = 4595707872. Its totient is φ = 4212732172.

The previous prime is 4404219997. The next prime is 4404220031. The reversal of 4404220021 is 1200224044.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4404220021 - 2¹³ = 4404211829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4404220031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 95743891 + ... + 95743936.

It is an arithmetic number, because the mean of its divisors is an integer number (1148926968).

Almost surely, 2^4404220021 is an apocalyptic number.

It is an amenable number.

4404220021 is a deficient number, since it is larger than the sum of its proper divisors (191487851).

4404220021 is a wasteful number, since it uses less digits than its factorization.

4404220021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191487850.

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

The square root of 4404220021 is about 66364.2977887960. The cubic root of 4404220021 is about 1639.1662454712.

Adding to 4404220021 its reverse (1200224044), we get a palindrome (5604444065).

The spelling of 4404220021 in words is "four billion, four hundred four million, two hundred twenty thousand, twenty-one".