210122189 has 2 divisors, whose sum is σ = 210122190. Its totient is φ = 210122188.

The previous prime is 210122179. The next prime is 210122201. The reversal of 210122189 is 981221012.

210122189 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 can be written as a sum of positive squares in only one way, i.e., 209294089 + 828100 = 14467^2 + 910^2 .

It is a cyclic number.

It is not a de Polignac number, because 210122189 - 2⁴ = 210122173 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210122119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105061094 + 105061095.

It is an arithmetic number, because the mean of its divisors is an integer number (105061095).

Almost surely, 2^210122189 is an apocalyptic number.

It is an amenable number.

210122189 is a deficient number, since it is larger than the sum of its proper divisors (1).

210122189 is an equidigital number, since it uses as much as digits as its factorization.

210122189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 210122189 is about 14495.5920541384. The cubic root of 210122189 is about 594.5074557624.

The spelling of 210122189 in words is "two hundred ten million, one hundred twenty-two thousand, one hundred eighty-nine".