211042211 has 4 divisors (see below), whose sum is σ = 216189624. Its totient is φ = 205894800.

The previous prime is 211042207. The next prime is 211042231. The reversal of 211042211 is 112240112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 211042211 - 2² = 211042207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211042231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2573645 + ... + 2573726.

It is an arithmetic number, because the mean of its divisors is an integer number (54047406).

Almost surely, 2^211042211 is an apocalyptic number.

211042211 is a deficient number, since it is larger than the sum of its proper divisors (5147413).

211042211 is an equidigital number, since it uses as much as digits as its factorization.

211042211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5147412.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 211042211 is about 14527.2919362144. The cubic root of 211042211 is about 595.3738779578.

Adding to 211042211 its reverse (112240112), we get a palindrome (323282323).

The spelling of 211042211 in words is "two hundred eleven million, forty-two thousand, two hundred eleven".