12111212200 has 24 divisors (see below), whose sum is σ = 28158568830. Its totient is φ = 4844484800.

The previous prime is 12111212167. The next prime is 12111212207. The reversal of 12111212200 is 221211121.

12111212200 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 11818733796 + 292478404 = 108714^2 + 17102^2 .

It is not an unprimeable number, because it can be changed into a prime (12111212207) 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 5 ways as a sum of consecutive naturals, for example, 30277831 + ... + 30278230.

Almost surely, 2^12111212200 is an apocalyptic number.

12111212200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111212200 is an abundant number, since it is smaller than the sum of its proper divisors (16047356630).

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

12111212200 is a wasteful number, since it uses less digits than its factorization.

12111212200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60556077 (or 60556068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 12111212200 its reverse (221211121), we get a palindrome (12332423321).

The spelling of 12111212200 in words is "twelve billion, one hundred eleven million, two hundred twelve thousand, two hundred".