211120211 has 4 divisors (see below), whose sum is σ = 213663912. Its totient is φ = 208576512.

The previous prime is 211120201. The next prime is 211120213. The reversal of 211120211 is 112021112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211120211 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211120192 and 211120201.

It is not an unprimeable number, because it can be changed into a prime (211120213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1271726 + ... + 1271891.

It is an arithmetic number, because the mean of its divisors is an integer number (53415978).

Almost surely, 2^211120211 is an apocalyptic number.

211120211 is a deficient number, since it is larger than the sum of its proper divisors (2543701).

211120211 is an equidigital number, since it uses as much as digits as its factorization.

211120211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543700.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 211120211 is about 14529.9762904142. The cubic root of 211120211 is about 595.4472178554.

Adding to 211120211 its reverse (112021112), we get a palindrome (323141323).

Subtracting from 211120211 its reverse (112021112), we obtain a palindrome (99099099).

It can be divided in two parts, 2111 and 20211, that added together give a palindrome (22322).

The spelling of 211120211 in words is "two hundred eleven million, one hundred twenty thousand, two hundred eleven".