210220290221 has 2 divisors, whose sum is σ = 210220290222. Its totient is φ = 210220290220.

The previous prime is 210220290193. The next prime is 210220290229. The reversal of 210220290221 is 122092022012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178349114596 + 31871175625 = 422314^2 + 178525^2 .

It is a cyclic number.

It is not a de Polignac number, because 210220290221 - 2¹⁸ = 210220028077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210220290229) 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, 105110145110 + 105110145111.

It is an arithmetic number, because the mean of its divisors is an integer number (105110145111).

Almost surely, 2^210220290221 is an apocalyptic number.

It is an amenable number.

210220290221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210220290221 is an equidigital number, since it uses as much as digits as its factorization.

210220290221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 210220290221 in words is "two hundred ten billion, two hundred twenty million, two hundred ninety thousand, two hundred twenty-one".