4444021021 has 16 divisors (see below), whose sum is σ = 4878374400. Its totient is φ = 4014788400.

The previous prime is 4444020937. The next prime is 4444021031. The reversal of 4444021021 is 1201204444.

It is a cyclic number.

It is not a de Polignac number, because 4444021021 - 2¹¹ = 4444018973 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4444020983 and 4444021001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4444021031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2364160 + ... + 2366038.

It is an arithmetic number, because the mean of its divisors is an integer number (304898400).

Almost surely, 2^4444021021 is an apocalyptic number.

It is an amenable number.

4444021021 is a deficient number, since it is larger than the sum of its proper divisors (434353379).

4444021021 is a wasteful number, since it uses less digits than its factorization.

4444021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3120.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4444021021 is about 66663.4909151929. The cubic root of 4444021021 is about 1644.0891686282.

Adding to 4444021021 its reverse (1201204444), we get a palindrome (5645225465).

The spelling of 4444021021 in words is "four billion, four hundred forty-four million, twenty-one thousand, twenty-one".