212210301209 has 4 divisors (see below), whose sum is σ = 212341865316. Its totient is φ = 212078737104.

The previous prime is 212210301203. The next prime is 212210301221. The reversal of 212210301209 is 902103012212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112780445584 + 99429855625 = 335828^2 + 315325^2 .

It is a cyclic number.

It is not a de Polignac number, because 212210301209 - 2¹² = 212210297113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212210301203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65779634 + ... + 65782859.

It is an arithmetic number, because the mean of its divisors is an integer number (53085466329).

Almost surely, 2^212210301209 is an apocalyptic number.

It is an amenable number.

212210301209 is a deficient number, since it is larger than the sum of its proper divisors (131564107).

212210301209 is a wasteful number, since it uses less digits than its factorization.

212210301209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131564106.

The product of its (nonzero) digits is 432, while the sum is 23.

The spelling of 212210301209 in words is "two hundred twelve billion, two hundred ten million, three hundred one thousand, two hundred nine".