211322311111 has 4 divisors (see below), whose sum is σ = 223753035312. Its totient is φ = 198891586912.

The previous prime is 211322311063. The next prime is 211322311117. The reversal of 211322311111 is 111113223112.

211322311111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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-211322311111 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 (211322311117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6215362075 + ... + 6215362108.

It is an arithmetic number, because the mean of its divisors is an integer number (55938258828).

Almost surely, 2^211322311111 is an apocalyptic number.

211322311111 is a deficient number, since it is larger than the sum of its proper divisors (12430724201).

211322311111 is a wasteful number, since it uses less digits than its factorization.

211322311111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12430724200.

The product of its digits is 72, while the sum is 19.

Adding to 211322311111 its reverse (111113223112), we get a palindrome (322435534223).

The spelling of 211322311111 in words is "two hundred eleven billion, three hundred twenty-two million, three hundred eleven thousand, one hundred eleven".