212021113209 has 32 divisors (see below), whose sum is σ = 301521792000. Its totient is φ = 132323792832.

The previous prime is 212021113193. The next prime is 212021113223. The reversal of 212021113209 is 902311120212.

It is not a de Polignac number, because 212021113209 - 2⁴ = 212021113193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (212021113229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11709 + ... + 651290.

It is an arithmetic number, because the mean of its divisors is an integer number (9422556000).

Almost surely, 2^212021113209 is an apocalyptic number.

It is an amenable number.

212021113209 is a deficient number, since it is larger than the sum of its proper divisors (89500678791).

212021113209 is a wasteful number, since it uses less digits than its factorization.

212021113209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663149.

The product of its (nonzero) digits is 432, while the sum is 24.

The spelling of 212021113209 in words is "two hundred twelve billion, twenty-one million, one hundred thirteen thousand, two hundred nine".