1111222200 has 192 divisors, whose sum is σ = 3797435520. Its totient is φ = 266560000.

The previous prime is 1111222199. The next prime is 1111222213. The reversal of 1111222200 is 22221111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a zygodrome in base 10.

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 47 ways as a sum of consecutive naturals, for example, 665767 + ... + 667433.

It is an arithmetic number, because the mean of its divisors is an integer number (19778310).

Almost surely, 2^1111222200 is an apocalyptic number.

1111222200 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 1111222200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1898717760).

1111222200 is an abundant number, since it is smaller than the sum of its proper divisors (2686213320).

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

1111222200 is a wasteful number, since it uses less digits than its factorization.

1111222200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798 (or 1789 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 1111222200 is about 33334.9996250187. Note that the first 3 decimals coincide. The cubic root of 1111222200 is about 1035.7786854016.

Adding to 1111222200 its reverse (22221111), we get a palindrome (1133443311).

It can be divided in two parts, 11 and 11222200, that added together give a palindrome (11222211).

The spelling of 1111222200 in words is "one billion, one hundred eleven million, two hundred twenty-two thousand, two hundred".