211112121111 has 16 divisors (see below), whose sum is σ = 304305763200. Its totient is φ = 129730349088.

The previous prime is 211112121109. The next prime is 211112121119. The reversal of 211112121111 is 111121211112.

It is not a de Polignac number, because 211112121111 - 2¹ = 211112121109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112121119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50048181 + ... + 50052398.

It is an arithmetic number, because the mean of its divisors is an integer number (19019110200).

Almost surely, 2^211112121111 is an apocalyptic number.

211112121111 is a deficient number, since it is larger than the sum of its proper divisors (93193642089).

211112121111 is a wasteful number, since it uses less digits than its factorization.

211112121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100100638.

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

Adding to 211112121111 its reverse (111121211112), we get a palindrome (322233332223).

Subtracting from 211112121111 its reverse (111121211112), we obtain a palindrome (99990909999).

It can be divided in two parts, 2 and 11112121111, that multiplied together give a palindrome (22224242222).

The spelling of 211112121111 in words is "two hundred eleven billion, one hundred twelve million, one hundred twenty-one thousand, one hundred eleven".