110011111111111 has 4 divisors (see below), whose sum is σ = 125726984126992. Its totient is φ = 94295238095232.

The previous prime is 110011111111067. The next prime is 110011111111123. The reversal of 110011111111111 is 111111111110011.

It is a happy number.

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 110011111111111 - 2³⁹ = 109461355297223 is a prime.

It is a Duffinian number.

110011111111111 is a modest number, since divided by 11111111 gives 1100111 as remainder.

It is a zygodrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 110011111111091 and 110011111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (110011111151111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7857936507930 + ... + 7857936507943.

It is an arithmetic number, because the mean of its divisors is an integer number (31431746031748).

Almost surely, 2^{110011111111111} is an apocalyptic number.

110011111111111 is a deficient number, since it is larger than the sum of its proper divisors (15715873015881).

110011111111111 is an equidigital number, since it uses as much as digits as its factorization.

110011111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15715873015880.

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

Adding to 110011111111111 its reverse (111111111110011), we get a palindrome (221122222221122).

It can be divided in two parts, 110011 and 111111111, that multiplied together give a palindrome (12223444432221).

The spelling of 110011111111111 in words is "one hundred ten trillion, eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".