111011111101111 has 8 divisors (see below), whose sum is σ = 119593852887600. Its totient is φ = 102434572964352.

The previous prime is 111011111101061. The next prime is 111011111101207. The reversal of 111011111101111 is 111101111110111.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 111011111101111 - 2²⁵ = 111011077546679 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a junction number, because it is equal to n+sod(n) for n = 111011111101091 and 111011111101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111011111108111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550875261 + ... + 1550946838.

It is an arithmetic number, because the mean of its divisors is an integer number (14949231610950).

Almost surely, 2^{111011111101111} is an apocalyptic number.

111011111101111 is a deficient number, since it is larger than the sum of its proper divisors (8582741786489).

111011111101111 is a wasteful number, since it uses less digits than its factorization.

111011111101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3101824865.

The product of its (nonzero) digits is 1, while the sum is 13.

Adding to 111011111101111 its reverse (111101111110111), we get a palindrome (222112222211222).

The spelling of 111011111101111 in words is "one hundred eleven trillion, eleven billion, one hundred eleven million, one hundred one thousand, one hundred eleven".