211112220211 has 4 divisors (see below), whose sum is σ = 212456884192. Its totient is φ = 209767556232.

The previous prime is 211112220107. The next prime is 211112220227. The reversal of 211112220211 is 112022211112.

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 211112220211 - 2¹⁹ = 211111695923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211112221211) 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, 672331755 + ... + 672332068.

It is an arithmetic number, because the mean of its divisors is an integer number (53114221048).

Almost surely, 2^211112220211 is an apocalyptic number.

211112220211 is a deficient number, since it is larger than the sum of its proper divisors (1344663981).

211112220211 is a wasteful number, since it uses less digits than its factorization.

211112220211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344663980.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 211112220211 its reverse (112022211112), we get a palindrome (323134431323).

Subtracting from 211112220211 its reverse (112022211112), we obtain a palindrome (99090009099).

The spelling of 211112220211 in words is "two hundred eleven billion, one hundred twelve million, two hundred twenty thousand, two hundred eleven".