210221044902157 has 2 divisors, whose sum is σ = 210221044902158. Its totient is φ = 210221044902156.

The previous prime is 210221044902061. The next prime is 210221044902161. The reversal of 210221044902157 is 751209440122012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 166997441717001 + 43223603185156 = 12922749^2 + 6574466^2 .

It is a cyclic number.

It is not a de Polignac number, because 210221044902157 - 2²⁷ = 210220910684429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210221044902257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110522451078 + 105110522451079.

It is an arithmetic number, because the mean of its divisors is an integer number (105110522451079).

Almost surely, 2^{210221044902157} is an apocalyptic number.

It is an amenable number.

210221044902157 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221044902157 is an equidigital number, since it uses as much as digits as its factorization.

210221044902157 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80640, while the sum is 40.

The spelling of 210221044902157 in words is "two hundred ten trillion, two hundred twenty-one billion, forty-four million, nine hundred two thousand, one hundred fifty-seven".