212021102010209 has 16 divisors (see below), whose sum is σ = 217019859315072. Its totient is φ = 207025447563648.

The previous prime is 212021102010203. The next prime is 212021102010239. The reversal of 212021102010209 is 902010201120212.

It is a cyclic number.

It is not a de Polignac number, because 212021102010209 - 2³⁶ = 211952382533473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212021102010203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1923335357 + ... + 1923445589.

It is an arithmetic number, because the mean of its divisors is an integer number (13563741207192).

Almost surely, 2^{212021102010209} is an apocalyptic number.

It is an amenable number.

212021102010209 is a deficient number, since it is larger than the sum of its proper divisors (4998757304863).

212021102010209 is a wasteful number, since it uses less digits than its factorization.

212021102010209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123896.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 212021102010209 in words is "two hundred twelve trillion, twenty-one billion, one hundred two million, ten thousand, two hundred nine".