211113120209 has 4 divisors (see below), whose sum is σ = 211114861620. Its totient is φ = 211111378800.

The previous prime is 211113120193. The next prime is 211113120217. The reversal of 211113120209 is 902021311112.

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 90914310400 + 120198809809 = 301520^2 + 346697^2 .

It is a cyclic number.

It is not a de Polignac number, because 211113120209 - 2⁴ = 211113120193 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (211113120289) 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, 674054 + ... + 936255.

It is an arithmetic number, because the mean of its divisors is an integer number (52778715405).

Almost surely, 2^211113120209 is an apocalyptic number.

It is an amenable number.

211113120209 is a deficient number, since it is larger than the sum of its proper divisors (1741411).

211113120209 is a wasteful number, since it uses less digits than its factorization.

211113120209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1741410.

The product of its (nonzero) digits is 216, while the sum is 23.

The spelling of 211113120209 in words is "two hundred eleven billion, one hundred thirteen million, one hundred twenty thousand, two hundred nine".