211112222211111 has 16 divisors (see below), whose sum is σ = 303286237358720. Its totient is φ = 129850611325920.

The previous prime is 211112222211019. The next prime is 211112222211181. The reversal of 211112222211111 is 111112222211112.

It is not a de Polignac number, because 211112222211111 - 2²⁷ = 211112087993383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112222211181) 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 15 ways as a sum of consecutive naturals, for example, 1345802701 + ... + 1345959558.

It is an arithmetic number, because the mean of its divisors is an integer number (18955389834920).

Almost surely, 2^{211112222211111} is an apocalyptic number.

211112222211111 is a deficient number, since it is larger than the sum of its proper divisors (92174015147609).

211112222211111 is a wasteful number, since it uses less digits than its factorization.

211112222211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2691764286.

The product of its digits is 64, while the sum is 21.

Adding to 211112222211111 its reverse (111112222211112), we get a palindrome (322224444422223).

Subtracting from 211112222211111 its reverse (111112222211112), we obtain a palindrome (99999999999999).

The spelling of 211112222211111 in words is "two hundred eleven trillion, one hundred twelve billion, two hundred twenty-two million, two hundred eleven thousand, one hundred eleven".