1222112200 has 48 divisors (see below), whose sum is σ = 2939404500. Its totient is φ = 471985920.

The previous prime is 1222112197. The next prime is 1222112207. The reversal of 1222112200 is 22112221.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 139570596 + 1082541604 = 11814^2 + 32902^2 .

It is not an unprimeable number, because it can be changed into a prime (1222112207) by changing a digit.

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, 99555 + ... + 111154.

Almost surely, 2^1222112200 is an apocalyptic number.

1222112200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222112200 is an abundant number, since it is smaller than the sum of its proper divisors (1717292300).

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

1222112200 is a wasteful number, since it uses less digits than its factorization.

1222112200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210754 (or 210745 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 1222112200 is about 34958.7213724987. The cubic root of 1222112200 is about 1069.1460272127.

Adding to 1222112200 its reverse (22112221), we get a palindrome (1244224421).

The spelling of 1222112200 in words is "one billion, two hundred twenty-two million, one hundred twelve thousand, two hundred".