210221032997 has 2 divisors, whose sum is σ = 210221032998. Its totient is φ = 210221032996.

The previous prime is 210221032993. The next prime is 210221033047. The reversal of 210221032997 is 799230122012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107773667521 + 102447365476 = 328289^2 + 320074^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221032997 - 2² = 210221032993 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210221032997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210221032993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110516498 + 105110516499.

It is an arithmetic number, because the mean of its divisors is an integer number (105110516499).

Almost surely, 2^210221032997 is an apocalyptic number.

It is an amenable number.

210221032997 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221032997 is an equidigital number, since it uses as much as digits as its factorization.

210221032997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27216, while the sum is 38.

The spelling of 210221032997 in words is "two hundred ten billion, two hundred twenty-one million, thirty-two thousand, nine hundred ninety-seven".