4452221321 has 2 divisors, whose sum is σ = 4452221322. Its totient is φ = 4452221320.

The previous prime is 4452221287. The next prime is 4452221327. The reversal of 4452221321 is 1231222544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4392375625 + 59845696 = 66275^2 + 7736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4452221321 is a prime.

It is not a weakly prime, because it can be changed into another prime (4452221327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2226110660 + 2226110661.

It is an arithmetic number, because the mean of its divisors is an integer number (2226110661).

Almost surely, 2^4452221321 is an apocalyptic number.

It is an amenable number.

4452221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4452221321 is an equidigital number, since it uses as much as digits as its factorization.

4452221321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 26.

The square root of 4452221321 is about 66724.9677482125. The cubic root of 4452221321 is about 1645.0997954380.

Adding to 4452221321 its reverse (1231222544), we get a palindrome (5683443865).

The spelling of 4452221321 in words is "four billion, four hundred fifty-two million, two hundred twenty-one thousand, three hundred twenty-one".