20212102209 has 8 divisors (see below), whose sum is σ = 29022505792. Its totient is φ = 12438216720.

The previous prime is 20212102199. The next prime is 20212102231. The reversal of 20212102209 is 90220121202.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20212102209 - 2⁸ = 20212101953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20212102609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 259129477 + ... + 259129554.

It is an arithmetic number, because the mean of its divisors is an integer number (3627813224).

Almost surely, 2^20212102209 is an apocalyptic number.

It is an amenable number.

20212102209 is a deficient number, since it is larger than the sum of its proper divisors (8810403583).

20212102209 is a wasteful number, since it uses less digits than its factorization.

20212102209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518259047.

The product of its (nonzero) digits is 288, while the sum is 21.

The spelling of 20212102209 in words is "twenty billion, two hundred twelve million, one hundred two thousand, two hundred nine".