11111112200 has 96 divisors (see below), whose sum is σ = 26838405000. Its totient is φ = 4272844800.

The previous prime is 11111112191. The next prime is 11111112209. The reversal of 11111112200 is 221111111.

It is an interprime number because it is at equal distance from previous prime (11111112191) and next prime (11111112209).

It can be written as a sum of positive squares in 12 ways, for example, as 1562304676 + 9548807524 = 39526^2 + 97718^2 .

It is a zygodrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (11111112209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1393826 + ... + 1401774.

Almost surely, 2^11111112200 is an apocalyptic number.

11111112200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11111112200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13419202500).

11111112200 is an abundant number, since it is smaller than the sum of its proper divisors (15727292800).

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

11111112200 is a wasteful number, since it uses less digits than its factorization.

11111112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8235 (or 8226 counting only the distinct ones).

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

Adding to 11111112200 its reverse (221111111), we get a palindrome (11332223311).

The spelling of 11111112200 in words is "eleven billion, one hundred eleven million, one hundred twelve thousand, two hundred".