111128055 has 16 divisors (see below), whose sum is σ = 187163520. Its totient is φ = 56148768.

The previous prime is 111128053. The next prime is 111128071. The reversal of 111128055 is 550821111.

It is not a de Polignac number, because 111128055 - 2¹ = 111128053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111128051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 194677 + ... + 195246.

It is an arithmetic number, because the mean of its divisors is an integer number (11697720).

Almost surely, 2^111128055 is an apocalyptic number.

111128055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111128055 is a deficient number, since it is larger than the sum of its proper divisors (76035465).

111128055 is a wasteful number, since it uses less digits than its factorization.

111128055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389950.

The product of its (nonzero) digits is 400, while the sum is 24.

The square root of 111128055 is about 10541.7292224758. The cubic root of 111128055 is about 480.7742928435.

Adding to 111128055 its reverse (550821111), we get a palindrome (661949166).

The spelling of 111128055 in words is "one hundred eleven million, one hundred twenty-eight thousand, fifty-five".