11101111220 has 12 divisors (see below), whose sum is σ = 23312333604. Its totient is φ = 4440444480.

The previous prime is 11101111183. The next prime is 11101111261. The reversal of 11101111220 is 2211110111.

11101111220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7375717924 + 3725393296 = 85882^2 + 61036^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277527761 + ... + 277527800.

It is an arithmetic number, because the mean of its divisors is an integer number (1942694467).

Almost surely, 2^11101111220 is an apocalyptic number.

11101111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11101111220 is an abundant number, since it is smaller than the sum of its proper divisors (12211222384).

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

11101111220 is a wasteful number, since it uses less digits than its factorization.

11101111220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555055570 (or 555055568 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 11101111220 its reverse (2211110111), we get a palindrome (13312221331).

The spelling of 11101111220 in words is "eleven billion, one hundred one million, one hundred eleven thousand, two hundred twenty".