11111113888885 has 16 divisors (see below), whose sum is σ = 13353788347632. Its totient is φ = 8875267084800.

The previous prime is 11111113888817. The next prime is 11111113888909. The reversal of 11111113888885 is 58888831111111.

11111113888885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 33359926609 + 11077753962276 = 182647^2 + 3328326^2 .

It is not a de Polignac number, because 11111113888885 - 2¹¹ = 11111113886837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7891065 + ... + 9191905.

It is an arithmetic number, because the mean of its divisors is an integer number (834611771727).

Almost surely, 2^{11111113888885} is an apocalyptic number.

It is an amenable number.

11111113888885 is a deficient number, since it is larger than the sum of its proper divisors (2242674458747).

11111113888885 is a wasteful number, since it uses less digits than its factorization.

11111113888885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303464.

The product of its digits is 491520, while the sum is 55.

Adding to 11111113888885 its reverse (58888831111111), we get a palindrome (69999944999996).

The spelling of 11111113888885 in words is "eleven trillion, one hundred eleven billion, one hundred thirteen million, eight hundred eighty-eight thousand, eight hundred eighty-five".