111110101128 has 48 divisors (see below), whose sum is σ = 324071131020. Its totient is φ = 34187723136.

The previous prime is 111110101093. The next prime is 111110101129. The reversal of 111110101128 is 821101011111.

It can be written as a sum of positive squares in 2 ways, for example, as 101670424164 + 9439676964 = 318858^2 + 97158^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 111110101128.

It is not an unprimeable number, because it can be changed into a prime (111110101129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 59352751 + ... + 59354622.

Almost surely, 2^111110101128 is an apocalyptic number.

111110101128 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

111110101128 is an abundant number, since it is smaller than the sum of its proper divisors (212961029892).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111110101128 is a wasteful number, since it uses less digits than its factorization.

111110101128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118707398 (or 118707391 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 111110101128 its reverse (821101011111), we get a palindrome (932211112239).

The spelling of 111110101128 in words is "one hundred eleven billion, one hundred ten million, one hundred one thousand, one hundred twenty-eight".