210122109 has 6 divisors (see below), whose sum is σ = 303509726. Its totient is φ = 140081400.

The previous prime is 210122071. The next prime is 210122119. The reversal of 210122109 is 901221012.

It can be written as a sum of positive squares in only one way, i.e., 196616484 + 13505625 = 14022^2 + 3675^2 .

It is not a de Polignac number, because 210122109 - 2⁷ = 210121981 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210122091 and 210122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210122119) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11673442 + ... + 11673459.

Almost surely, 2^210122109 is an apocalyptic number.

It is an amenable number.

210122109 is a deficient number, since it is larger than the sum of its proper divisors (93387617).

210122109 is a wasteful number, since it uses less digits than its factorization.

210122109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23346907 (or 23346904 counting only the distinct ones).

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

The square root of 210122109 is about 14495.5892946786. The cubic root of 210122109 is about 594.5073803132.

The spelling of 210122109 in words is "two hundred ten million, one hundred twenty-two thousand, one hundred nine".