111211222101200 has 120 divisors (see below), whose sum is σ = 287767236015000. Its totient is φ = 41058382970880.

The previous prime is 111211222101157. The next prime is 111211222101269. The reversal of 111211222101200 is 2101222112111.

It can be written as a sum of positive squares in 12 ways, for example, as 29648504161936 + 81562717939264 = 5445044^2 + 9031208^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 49704176 + ... + 51893424.

It is an arithmetic number, because the mean of its divisors is an integer number (2398060300125).

Almost surely, 2^{111211222101200} is an apocalyptic number.

111211222101200 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 111211222101200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143883618007500).

111211222101200 is an abundant number, since it is smaller than the sum of its proper divisors (176556013913800).

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

111211222101200 is a wasteful number, since it uses less digits than its factorization.

111211222101200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2199049 (or 2199038 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 111211222101200 its reverse (2101222112111), we get a palindrome (113312444213311).

The spelling of 111211222101200 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twenty-two million, one hundred one thousand, two hundred".