11111113888889 has 16 divisors (see below), whose sum is σ = 12968974265856. Its totient is φ = 9320904964800.

The previous prime is 11111113888817. The next prime is 11111113888909. The reversal of 11111113888889 is 98888831111111.

11111113888889 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11111113888889 is a prime.

It is a Curzon number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11111113887889) 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, 11190479 + ... + 12142859.

It is an arithmetic number, because the mean of its divisors is an integer number (810560891616).

Almost surely, 2^{11111113888889} is an apocalyptic number.

It is an amenable number.

11111113888889 is a deficient number, since it is larger than the sum of its proper divisors (1857860376967).

11111113888889 is an equidigital number, since it uses as much as digits as its factorization.

11111113888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 987896.

The product of its digits is 884736, while the sum is 59.

The spelling of 11111113888889 in words is "eleven trillion, one hundred eleven billion, one hundred thirteen million, eight hundred eighty-eight thousand, eight hundred eighty-nine".