210120320102221 has 2 divisors, whose sum is σ = 210120320102222. Its totient is φ = 210120320102220.

The previous prime is 210120320102219. The next prime is 210120320102263. The reversal of 210120320102221 is 122201023021012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 156216251822500 + 53904068279721 = 12498650^2 + 7341939^2 .

It is a cyclic number.

It is not a de Polignac number, because 210120320102221 - 2¹ = 210120320102219 is a prime.

Together with 210120320102219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210120320112221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105060160051110 + 105060160051111.

It is an arithmetic number, because the mean of its divisors is an integer number (105060160051111).

Almost surely, 2^{210120320102221} is an apocalyptic number.

It is an amenable number.

210120320102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

210120320102221 is an equidigital number, since it uses as much as digits as its factorization.

210120320102221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 210120320102221 its reverse (122201023021012), we get a palindrome (332321343123233).

The spelling of 210120320102221 in words is "two hundred ten trillion, one hundred twenty billion, three hundred twenty million, one hundred two thousand, two hundred twenty-one".