111111110101111 has 8 divisors (see below), whose sum is σ = 114738163625360. Its totient is φ = 107531469041472.

The previous prime is 111111110101093. The next prime is 111111110101133. The reversal of 111111110101111 is 111101011111111.

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 111111110101111 - 2¹⁷ = 111111109970039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111110101091 and 111111110101100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111110101141) 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 7 ways as a sum of consecutive naturals, for example, 11853111390 + ... + 11853120763.

It is an arithmetic number, because the mean of its divisors is an integer number (14342270453170).

Almost surely, 2^{111111110101111} is an apocalyptic number.

111111110101111 is a deficient number, since it is larger than the sum of its proper divisors (3627053524249).

111111110101111 is a wasteful number, since it uses less digits than its factorization.

111111110101111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23706232305.

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

Adding to 111111110101111 its reverse (111101011111111), we get a palindrome (222212121212222).

It can be divided in two parts, 1111 and 11110101111, that multiplied together give a palindrome (12343322334321).

The spelling of 111111110101111 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred ten million, one hundred one thousand, one hundred eleven".