4440021043221 has 16 divisors (see below), whose sum is σ = 6670454152320. Its totient is φ = 2918323689120.

The previous prime is 4440021043141. The next prime is 4440021043229. The reversal of 4440021043221 is 1223401200444.

4440021043221 is a `hidden beast` number, since 4 + 4 + 400 + 210 + 43 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 4440021043221 - 2¹¹ = 4440021041173 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4440021043229) 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, 1158063040 + ... + 1158066873.

It is an arithmetic number, because the mean of its divisors is an integer number (416903384520).

Almost surely, 2^{4440021043221} is an apocalyptic number.

It is an amenable number.

4440021043221 is a deficient number, since it is larger than the sum of its proper divisors (2230433109099).

4440021043221 is a wasteful number, since it uses less digits than its factorization.

4440021043221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2316129993 (or 2316129987 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 4440021043221 its reverse (1223401200444), we get a palindrome (5663422243665).

The spelling of 4440021043221 in words is "four trillion, four hundred forty billion, twenty-one million, forty-three thousand, two hundred twenty-one".