11117228180 has 24 divisors (see below), whose sum is σ = 23476612320. Its totient is φ = 4422046880.

The previous prime is 11117228159. The next prime is 11117228189. The reversal of 11117228180 is 8182271111.

It is a happy number.

It is a super-2 number, since 2×11117228180² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11117228189) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1549106 + ... + 1556265.

It is an arithmetic number, because the mean of its divisors is an integer number (978192180).

Almost surely, 2^11117228180 is an apocalyptic number.

11117228180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11117228180 is an abundant number, since it is smaller than the sum of its proper divisors (12359384140).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11117228180 is a wasteful number, since it uses less digits than its factorization.

11117228180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3105559 (or 3105557 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 32.

Adding to 11117228180 its reverse (8182271111), we get a palindrome (19299499291).

The spelling of 11117228180 in words is "eleven billion, one hundred seventeen million, two hundred twenty-eight thousand, one hundred eighty".