111000111111 has 24 divisors (see below), whose sum is σ = 164731235760. Its totient is φ = 71971911936.

The previous prime is 111000111007. The next prime is 111000111143. The reversal of 111000111111 is 111111000111.

It is not a de Polignac number, because 111000111111 - 2¹¹ = 111000109063 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

111000111111 is a modest number, since divided by 111111 gives 111000 as remainder.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 111000111093 and 111000111102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111000111181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 804916 + ... + 932678.

It is an arithmetic number, because the mean of its divisors is an integer number (6863801490).

Almost surely, 2^111000111111 is an apocalyptic number.

111000111111 is a deficient number, since it is larger than the sum of its proper divisors (53731124649).

111000111111 is a wasteful number, since it uses less digits than its factorization.

111000111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130415 (or 130412 counting only the distinct ones).

The product of its (nonzero) digits is 1, while the sum is 9.

Adding to 111000111111 its reverse (111111000111), we get a palindrome (222111111222).

It can be divided in two parts, 111000111 and 111, that multiplied together give a palindrome (12321012321).

The spelling of 111000111111 in words is "one hundred eleven billion, one hundred eleven thousand, one hundred eleven".