211100112222111 has 64 divisors (see below), whose sum is σ = 365901591767040. Its totient is φ = 117798205651200.

The previous prime is 211100112222107. The next prime is 211100112222133. The reversal of 211100112222111 is 111222211001112.

It is a happy number.

211100112222111 is a `hidden beast` number, since 211 + 10 + 0 + 11 + 222 + 211 + 1 = 666.

It is not a de Polignac number, because 211100112222111 - 2² = 211100112222107 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211100112222151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 74351235 + ... + 77138228.

It is an arithmetic number, because the mean of its divisors is an integer number (5717212371360).

Almost surely, 2^{211100112222111} is an apocalyptic number.

211100112222111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

211100112222111 is a deficient number, since it is larger than the sum of its proper divisors (154801479544929).

211100112222111 is a wasteful number, since it uses less digits than its factorization.

211100112222111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151489653 (or 151489647 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 211100112222111 its reverse (111222211001112), we get a palindrome (322322323223223).

The spelling of 211100112222111 in words is "two hundred eleven trillion, one hundred billion, one hundred twelve million, two hundred twenty-two thousand, one hundred eleven".