11217117055 has 16 divisors (see below), whose sum is σ = 14555583360. Its totient is φ = 8266127872.

The previous prime is 11217117029. The next prime is 11217117101. The reversal of 11217117055 is 55071171211.

It is not a de Polignac number, because 11217117055 - 2⁷ = 11217116927 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1399900 + ... + 1407889.

It is an arithmetic number, because the mean of its divisors is an integer number (909723960).

Almost surely, 2^11217117055 is an apocalyptic number.

11217117055 is a deficient number, since it is larger than the sum of its proper divisors (3338466305).

11217117055 is a wasteful number, since it uses less digits than its factorization.

11217117055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2807858.

The product of its (nonzero) digits is 2450, while the sum is 31.

Adding to 11217117055 its reverse (55071171211), we get a palindrome (66288288266).

The spelling of 11217117055 in words is "eleven billion, two hundred seventeen million, one hundred seventeen thousand, fifty-five".