111101101111111 has 4 divisors (see below), whose sum is σ = 116948527485400. Its totient is φ = 105253674736824.

The previous prime is 111101101111087. The next prime is 111101101111139. The reversal of 111101101111111 is 111111101101111.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111101101111111 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111101101111091 and 111101101111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111101101114111) 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, 2923713187116 + ... + 2923713187153.

It is an arithmetic number, because the mean of its divisors is an integer number (29237131871350).

Almost surely, 2^{111101101111111} is an apocalyptic number.

111101101111111 is a deficient number, since it is larger than the sum of its proper divisors (5847426374289).

111101101111111 is an equidigital number, since it uses as much as digits as its factorization.

111101101111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847426374288.

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

Adding to 111101101111111 its reverse (111111101101111), we get a palindrome (222212202212222).

It can be divided in two parts, 111101101111 and 111, that multiplied together give a palindrome (12332222223321).

The spelling of 111101101111111 in words is "one hundred eleven trillion, one hundred one billion, one hundred one million, one hundred eleven thousand, one hundred eleven".