4044344321221 has 2 divisors, whose sum is σ = 4044344321222. Its totient is φ = 4044344321220.

The previous prime is 4044344321161. The next prime is 4044344321231. The reversal of 4044344321221 is 1221234434404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2806663596100 + 1237680725121 = 1675310^2 + 1112511^2 .

It is a cyclic number.

It is not a de Polignac number, because 4044344321221 - 2⁷ = 4044344321093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4044344321231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2022172160610 + 2022172160611.

It is an arithmetic number, because the mean of its divisors is an integer number (2022172160611).

Almost surely, 2^{4044344321221} is an apocalyptic number.

It is an amenable number.

4044344321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4044344321221 is an equidigital number, since it uses as much as digits as its factorization.

4044344321221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 34.

Adding to 4044344321221 its reverse (1221234434404), we get a palindrome (5265578755625).

The spelling of 4044344321221 in words is "four trillion, forty-four billion, three hundred forty-four million, three hundred twenty-one thousand, two hundred twenty-one".