210122209 has 12 divisors (see below), whose sum is σ = 234701712. Its totient is φ = 186559800.

The previous prime is 210122207. The next prime is 210122279. The reversal of 210122209 is 902221012.

It is not a de Polignac number, because 210122209 - 2¹ = 210122207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (210122201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15174 + ... + 25504.

It is an arithmetic number, because the mean of its divisors is an integer number (19558476).

Almost surely, 2^210122209 is an apocalyptic number.

It is an amenable number.

210122209 is a deficient number, since it is larger than the sum of its proper divisors (24579503).

210122209 is a wasteful number, since it uses less digits than its factorization.

210122209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10428 (or 10385 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 210122209 is about 14495.5927440033. The cubic root of 210122209 is about 594.5074746246.

It can be divided in two parts, 2101 and 22209, that added together give a triangular number (24310 = T₂₂₀).

The spelling of 210122209 in words is "two hundred ten million, one hundred twenty-two thousand, two hundred nine".