4440321220221 has 12 divisors (see below), whose sum is σ = 6413886764220. Its totient is φ = 2960172864000.

The previous prime is 4440321220217. The next prime is 4440321220289. The reversal of 4440321220221 is 1220221230444.

It is a happy number.

4440321220221 is a `hidden beast` number, since 4 + 4 + 403 + 2 + 12 + 20 + 221 = 666.

4440321220221 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 2131103628900 + 2309217591321 = 1459830^2 + 1519611^2 .

It is not a de Polignac number, because 4440321220221 - 2² = 4440321220217 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4440321620221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2751780 + ... + 4056221.

It is an arithmetic number, because the mean of its divisors is an integer number (534490563685).

Almost surely, 2^{4440321220221} is an apocalyptic number.

It is an amenable number.

4440321220221 is a deficient number, since it is larger than the sum of its proper divisors (1973565543999).

4440321220221 is a wasteful number, since it uses less digits than its factorization.

4440321220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880476 (or 6880473 counting only the distinct ones).

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

Adding to 4440321220221 its reverse (1220221230444), we get a palindrome (5660542450665).

The spelling of 4440321220221 in words is "four trillion, four hundred forty billion, three hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".