202100101209 has 12 divisors (see below), whose sum is σ = 291945406896. Its totient is φ = 134722767672.

The previous prime is 202100101171. The next prime is 202100101213. The reversal of 202100101209 is 902101001202.

It is not a de Polignac number, because 202100101209 - 2¹¹ = 202100099161 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202100101191 and 202100101200.

It is not an unprimeable number, because it can be changed into a prime (202100101219) 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, 764847 + ... + 994580.

It is an arithmetic number, because the mean of its divisors is an integer number (24328783908).

Almost surely, 2^202100101209 is an apocalyptic number.

It is an amenable number.

202100101209 is a deficient number, since it is larger than the sum of its proper divisors (89845305687).

202100101209 is a wasteful number, since it uses less digits than its factorization.

202100101209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1772196 (or 1772193 counting only the distinct ones).

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

The spelling of 202100101209 in words is "two hundred two billion, one hundred million, one hundred one thousand, two hundred nine".