211112211111 has 8 divisors (see below), whose sum is σ = 281602890624. Its totient is φ = 140681502840.

The previous prime is 211112211097. The next prime is 211112211119. The reversal of 211112211111 is 111112211112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211112211111 - 2⁷ = 211112210983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112211119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14984595 + ... + 14998676.

It is an arithmetic number, because the mean of its divisors is an integer number (35200361328).

Almost surely, 2^211112211111 is an apocalyptic number.

211112211111 is a deficient number, since it is larger than the sum of its proper divisors (70490679513).

211112211111 is a wasteful number, since it uses less digits than its factorization.

211112211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29985621.

The product of its digits is 8, while the sum is 15.

Adding to 211112211111 its reverse (111112211112), we get a palindrome (322224422223).

Subtracting from 211112211111 its reverse (111112211112), we obtain a palindrome (99999999999).

The spelling of 211112211111 in words is "two hundred eleven billion, one hundred twelve million, two hundred eleven thousand, one hundred eleven".