111111100055 has 4 divisors (see below), whose sum is σ = 133333320072. Its totient is φ = 88888880040.

The previous prime is 111111100031. The next prime is 111111100097. The reversal of 111111100055 is 550001111111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 550001111111 = 10957 ⋅50196323.

It is not a de Polignac number, because 111111100055 - 2⁶ = 111111099991 is a prime.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11111110001 + ... + 11111110010.

It is an arithmetic number, because the mean of its divisors is an integer number (33333330018).

Almost surely, 2^111111100055 is an apocalyptic number.

111111100055 is a deficient number, since it is larger than the sum of its proper divisors (22222220017).

111111100055 is an equidigital number, since it uses as much as digits as its factorization.

111111100055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22222220016.

The product of its (nonzero) digits is 25, while the sum is 17.

Adding to 111111100055 its reverse (550001111111), we get a palindrome (661112211166).

The spelling of 111111100055 in words is "one hundred eleven billion, one hundred eleven million, one hundred thousand, fifty-five".