11112111200 has 144 divisors (see below), whose sum is σ = 29650852224. Its totient is φ = 4048281600.

The previous prime is 11112111191. The next prime is 11112111209. The reversal of 11112111200 is 211121111.

It is an interprime number because it is at equal distance from previous prime (11112111191) and next prime (11112111209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112111209) 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, 408422 + ... + 434778.

It is an arithmetic number, because the mean of its divisors is an integer number (205908696).

Almost surely, 2^11112111200 is an apocalyptic number.

11112111200 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 11112111200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14825426112).

11112111200 is an abundant number, since it is smaller than the sum of its proper divisors (18538741024).

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

11112111200 is a wasteful number, since it uses less digits than its factorization.

11112111200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26425 (or 26412 counting only the distinct ones).

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

Adding to 11112111200 its reverse (211121111), we get a palindrome (11323232311).

It can be divided in two parts, 11 and 112111200, that added together give a palindrome (112111211).

The spelling of 11112111200 in words is "eleven billion, one hundred twelve million, one hundred eleven thousand, two hundred".