11221221212200 has 48 divisors (see below), whose sum is σ = 26091740317500. Its totient is φ = 4488075409920.

The previous prime is 11221221212189. The next prime is 11221221212213. The reversal of 11221221212200 is 221212212211.

It can be written as a sum of positive squares in 6 ways, for example, as 108745614756 + 11112475597444 = 329766^2 + 3333538^2 .

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, 398475 + ... + 4754074.

Almost surely, 2^{11221221212200} is an apocalyptic number.

11221221212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11221221212200 is an abundant number, since it is smaller than the sum of its proper divisors (14870519105300).

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

11221221212200 is a wasteful number, since it uses less digits than its factorization.

11221221212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5163454 (or 5163445 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 11221221212200 its reverse (221212212211), we get a palindrome (11442433424411).

The spelling of 11221221212200 in words is "eleven trillion, two hundred twenty-one billion, two hundred twenty-one million, two hundred twelve thousand, two hundred".