11110128885 has 48 divisors (see below), whose sum is σ = 19996756416. Its totient is φ = 5917701888.

The previous prime is 11110128877. The next prime is 11110128899. The reversal of 11110128885 is 58882101111.

It is a happy number.

It is not a de Polignac number, because 11110128885 - 2³ = 11110128877 is a prime.

It is a super-2 number, since 2×11110128885² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 999277 + ... + 1010333.

It is an arithmetic number, because the mean of its divisors is an integer number (416599092).

Almost surely, 2^11110128885 is an apocalyptic number.

11110128885 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11110128885 is a deficient number, since it is larger than the sum of its proper divisors (8886627531).

11110128885 is an equidigital number, since it uses as much as digits as its factorization.

11110128885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11904 (or 11892 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 36.

Adding to 11110128885 its reverse (58882101111), we get a palindrome (69992229996).

The spelling of 11110128885 in words is "eleven billion, one hundred ten million, one hundred twenty-eight thousand, eight hundred eighty-five".