1123221200 has 60 divisors (see below), whose sum is σ = 2726453100. Its totient is φ = 444641280.

The previous prime is 1123221179. The next prime is 1123221217. The reversal of 1123221200 is 21223211.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 37650496 + 1085570704 = 6136^2 + 32948^2 .

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 11 ways as a sum of consecutive naturals, for example, 24326 + ... + 53274.

It is an arithmetic number, because the mean of its divisors is an integer number (45440885).

Almost surely, 2^1123221200 is an apocalyptic number.

1123221200 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 1123221200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1363226550).

1123221200 is an abundant number, since it is smaller than the sum of its proper divisors (1603231900).

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

1123221200 is a wasteful number, since it uses less digits than its factorization.

1123221200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29064 (or 29053 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 1123221200 is about 33514.4923876224. The cubic root of 1123221200 is about 1039.4934663498.

Adding to 1123221200 its reverse (21223211), we get a palindrome (1144444411).

The spelling of 1123221200 in words is "one billion, one hundred twenty-three million, two hundred twenty-one thousand, two hundred".