211111112112111 has 12 divisors (see below), whose sum is σ = 309233178306000. Its totient is φ = 138758477444160.

The previous prime is 211111112112091. The next prime is 211111112112119. The reversal of 211111112112111 is 111211211111112.

211111112112111 is a `hidden beast` number, since 21 + 111 + 111 + 211 + 211 + 1 = 666.

It is not a de Polignac number, because 211111112112111 - 2²³ = 211111103723503 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211111112112119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 165188662986 + ... + 165188664263.

It is an arithmetic number, because the mean of its divisors is an integer number (25769431525500).

Almost surely, 2^{211111112112111} is an apocalyptic number.

211111112112111 is a deficient number, since it is larger than the sum of its proper divisors (98122066193889).

211111112112111 is a wasteful number, since it uses less digits than its factorization.

211111112112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 330377327326 (or 330377327323 counting only the distinct ones).

The product of its digits is 8, while the sum is 18.

Adding to 211111112112111 its reverse (111211211111112), we get a palindrome (322322323223223).

The spelling of 211111112112111 in words is "two hundred eleven trillion, one hundred eleven billion, one hundred twelve million, one hundred twelve thousand, one hundred eleven".