4352221344521 has 2 divisors, whose sum is σ = 4352221344522. Its totient is φ = 4352221344520.

The previous prime is 4352221344509. The next prime is 4352221344557. The reversal of 4352221344521 is 1254431222534.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4123173913600 + 229047430921 = 2030560^2 + 478589^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4352221344521 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (4352221314521) 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, 2176110672260 + 2176110672261.

It is an arithmetic number, because the mean of its divisors is an integer number (2176110672261).

Almost surely, 2^{4352221344521} is an apocalyptic number.

It is an amenable number.

4352221344521 is a deficient number, since it is larger than the sum of its proper divisors (1).

4352221344521 is an equidigital number, since it uses as much as digits as its factorization.

4352221344521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 230400, while the sum is 38.

The spelling of 4352221344521 in words is "four trillion, three hundred fifty-two billion, two hundred twenty-one million, three hundred forty-four thousand, five hundred twenty-one".