111111100100111 has 4 divisors (see below), whose sum is σ = 115942017495792. Its totient is φ = 106280182704432.

The previous prime is 111111100100023. The next prime is 111111100100129. The reversal of 111111100100111 is 111001001111111.

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 111111100100111 - 2²² = 111111095905807 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111100100092 and 111111100100101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111100105111) 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, 2415458697806 + ... + 2415458697851.

It is an arithmetic number, because the mean of its divisors is an integer number (28985504373948).

Almost surely, 2^{111111100100111} is an apocalyptic number.

111111100100111 is a deficient number, since it is larger than the sum of its proper divisors (4830917395681).

111111100100111 is an equidigital number, since it uses as much as digits as its factorization.

111111100100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4830917395680.

The product of its (nonzero) digits is 1, while the sum is 11.

Adding to 111111100100111 its reverse (111001001111111), we get a palindrome (222112101211222).

It can be divided in two parts, 1111 and 11100100111, that multiplied together give a palindrome (12332211223321).

The spelling of 111111100100111 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred million, one hundred thousand, one hundred eleven".