210122091 has 12 divisors (see below), whose sum is σ = 321363432. Its totient is φ = 131841216.

The previous prime is 210122071. The next prime is 210122119. The reversal of 210122091 is 190221012.

210122091 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 210122091 - 2¹⁵ = 210089323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (210122021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 686521 + ... + 686826.

It is an arithmetic number, because the mean of its divisors is an integer number (26780286).

Almost surely, 2^210122091 is an apocalyptic number.

210122091 is a deficient number, since it is larger than the sum of its proper divisors (111241341).

210122091 is a wasteful number, since it uses less digits than its factorization.

210122091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373370 (or 1373367 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 210122091 is about 14495.5886738000. The cubic root of 210122091 is about 594.5073633372.

The spelling of 210122091 in words is "two hundred ten million, one hundred twenty-two thousand, ninety-one".