11217888111 has 8 divisors (see below), whose sum is σ = 14957933184. Its totient is φ = 7478217560.

The previous prime is 11217888047. The next prime is 11217888127. The reversal of 11217888111 is 11188871211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11217888111 - 2⁶ = 11217888047 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11217888111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11217888181) 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 7 ways as a sum of consecutive naturals, for example, 14085 + ... + 150446.

It is an arithmetic number, because the mean of its divisors is an integer number (1869741648).

Almost surely, 2^11217888111 is an apocalyptic number.

11217888111 is a deficient number, since it is larger than the sum of its proper divisors (3740045073).

11217888111 is a wasteful number, since it uses less digits than its factorization.

11217888111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187261.

The product of its digits is 7168, while the sum is 39.

The spelling of 11217888111 in words is "eleven billion, two hundred seventeen million, eight hundred eighty-eight thousand, one hundred eleven".