12111222212200 has 96 divisors (see below), whose sum is σ = 28199223538200. Its totient is φ = 4837501706240.

The previous prime is 12111222212123. The next prime is 12111222212207. The reversal of 12111222212200 is 221222211121.

It can be written as a sum of positive squares in 12 ways, for example, as 1352415488356 + 10758806723844 = 1162934^2 + 3280062^2 .

It is not an unprimeable number, because it can be changed into a prime (12111222212207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 825626466 + ... + 825641134.

Almost surely, 2^{12111222212200} is an apocalyptic number.

12111222212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111222212200 is an abundant number, since it is smaller than the sum of its proper divisors (16088001326000).

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

12111222212200 is a wasteful number, since it uses less digits than its factorization.

12111222212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20359 (or 20350 counting only the distinct ones).

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

Adding to 12111222212200 its reverse (221222211121), we get a palindrome (12332444423321).

The spelling of 12111222212200 in words is "twelve trillion, one hundred eleven billion, two hundred twenty-two million, two hundred twelve thousand, two hundred".