210221122199971 has 2 divisors, whose sum is σ = 210221122199972. Its totient is φ = 210221122199970.

The previous prime is 210221122199953. The next prime is 210221122200007. The reversal of 210221122199971 is 179991221122012.

210221122199971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 210221122199971 - 2²⁵ = 210221088645539 is a prime.

It is not a weakly prime, because it can be changed into another prime (210221122299971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105110561099985 + 105110561099986.

It is an arithmetic number, because the mean of its divisors is an integer number (105110561099986).

Almost surely, 2^{210221122199971} is an apocalyptic number.

210221122199971 is a deficient number, since it is larger than the sum of its proper divisors (1).

210221122199971 is an equidigital number, since it uses as much as digits as its factorization.

210221122199971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 163296, while the sum is 49.

The spelling of 210221122199971 in words is "two hundred ten trillion, two hundred twenty-one billion, one hundred twenty-two million, one hundred ninety-nine thousand, nine hundred seventy-one".