211110111010111 has 4 divisors (see below), whose sum is σ = 211246928970832. Its totient is φ = 210973293049392.

The previous prime is 211110111010033. The next prime is 211110111010157. The reversal of 211110111010111 is 111010111011112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 211110111010111 - 2²⁹ = 211109574139199 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211110111010091 and 211110111010100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211110111010171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68408978046 + ... + 68408981131.

It is an arithmetic number, because the mean of its divisors is an integer number (52811732242708).

Almost surely, 2^{211110111010111} is an apocalyptic number.

211110111010111 is a deficient number, since it is larger than the sum of its proper divisors (136817960721).

211110111010111 is a wasteful number, since it uses less digits than its factorization.

211110111010111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136817960720.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 211110111010111 its reverse (111010111011112), we get a palindrome (322120222021223).

The spelling of 211110111010111 in words is "two hundred eleven trillion, one hundred ten billion, one hundred eleven million, ten thousand, one hundred eleven".