4442020221 has 4 divisors (see below), whose sum is σ = 5922693632. Its totient is φ = 2961346812.

The previous prime is 4442020213. The next prime is 4442020223. The reversal of 4442020221 is 1220202444.

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 not a de Polignac number, because 4442020221 - 2³ = 4442020213 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4442020223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 740336701 + ... + 740336706.

It is an arithmetic number, because the mean of its divisors is an integer number (1480673408).

Almost surely, 2^4442020221 is an apocalyptic number.

It is an amenable number.

4442020221 is a deficient number, since it is larger than the sum of its proper divisors (1480673411).

4442020221 is a wasteful number, since it uses less digits than its factorization.

4442020221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1480673410.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 4442020221 is about 66648.4825108569. The cubic root of 4442020221 is about 1643.8423960631.

Adding to 4442020221 its reverse (1220202444), we get a palindrome (5662222665).

The spelling of 4442020221 in words is "four billion, four hundred forty-two million, twenty thousand, two hundred twenty-one".