11101220118 has 48 divisors (see below), whose sum is σ = 24292659456. Its totient is φ = 3663555840.

The previous prime is 11101220111. The next prime is 11101220189. The reversal of 11101220118 is 81102210111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 11101220118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101220111) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2208448 + ... + 2213468.

It is an arithmetic number, because the mean of its divisors is an integer number (506097072).

Almost surely, 2^11101220118 is an apocalyptic number.

11101220118 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

11101220118 is an abundant number, since it is smaller than the sum of its proper divisors (13191439338).

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

11101220118 is a wasteful number, since it uses less digits than its factorization.

11101220118 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6229 (or 6226 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 11101220118 its reverse (81102210111), we get a palindrome (92203430229).

The spelling of 11101220118 in words is "eleven billion, one hundred one million, two hundred twenty thousand, one hundred eighteen".