4444004420221 has 4 divisors (see below), whose sum is σ = 4444130522944. Its totient is φ = 4443878317500.

The previous prime is 4444004420213. The next prime is 4444004420287. The reversal of 4444004420221 is 1220244004444.

It is a happy number.

4444004420221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 4444004420221 - 2³ = 4444004420213 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 (4444004420621) 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, 62998485 + ... + 63068986.

It is an arithmetic number, because the mean of its divisors is an integer number (1111032630736).

Almost surely, 2^{4444004420221} is an apocalyptic number.

It is an amenable number.

4444004420221 is a deficient number, since it is larger than the sum of its proper divisors (126102723).

4444004420221 is a wasteful number, since it uses less digits than its factorization.

4444004420221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126102722.

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 4444004420221 its reverse (1220244004444), we get a palindrome (5664248424665).

The spelling of 4444004420221 in words is "four trillion, four hundred forty-four billion, four million, four hundred twenty thousand, two hundred twenty-one".