299446812221 has 2 divisors, whose sum is σ = 299446812222. Its totient is φ = 299446812220.

The previous prime is 299446812199. The next prime is 299446812289. The reversal of 299446812221 is 122218644992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 260493868996 + 38952943225 = 510386^2 + 197365^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-299446812221 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 299446812221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (299446814221) 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, 149723406110 + 149723406111.

It is an arithmetic number, because the mean of its divisors is an integer number (149723406111).

Almost surely, 2^299446812221 is an apocalyptic number.

It is an amenable number.

299446812221 is a deficient number, since it is larger than the sum of its proper divisors (1).

299446812221 is an equidigital number, since it uses as much as digits as its factorization.

299446812221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 995328, while the sum is 50.

The spelling of 299446812221 in words is "two hundred ninety-nine billion, four hundred forty-six million, eight hundred twelve thousand, two hundred twenty-one".