12121220200 has 48 divisors (see below), whose sum is σ = 28189356480. Its totient is φ = 4847194560.

The previous prime is 12121220173. The next prime is 12121220203. The reversal of 12121220200 is 202212121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12121220203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1175467 + ... + 1185733.

It is an arithmetic number, because the mean of its divisors is an integer number (587278260).

Almost surely, 2^12121220200 is an apocalyptic number.

12121220200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12121220200 is an abundant number, since it is smaller than the sum of its proper divisors (16068136280).

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

12121220200 is a wasteful number, since it uses less digits than its factorization.

12121220200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16186 (or 16177 counting only the distinct ones).

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

Adding to 12121220200 its reverse (202212121), we get a palindrome (12323432321).

The spelling of 12121220200 in words is "twelve billion, one hundred twenty-one million, two hundred twenty thousand, two hundred".