12121002200 has 96 divisors (see below), whose sum is σ = 28965958560. Its totient is φ = 4714214400.

The previous prime is 12121002191. The next prime is 12121002209. The reversal of 12121002200 is 220012121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12121002191) and next prime (12121002209).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121002209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2597069 + ... + 2601731.

It is an arithmetic number, because the mean of its divisors is an integer number (301728735).

Almost surely, 2^12121002200 is an apocalyptic number.

12121002200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12121002200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14482979280).

12121002200 is an abundant number, since it is smaller than the sum of its proper divisors (16844956360).

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

12121002200 is a wasteful number, since it uses less digits than its factorization.

12121002200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5037 (or 5028 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 12121002200 its reverse (220012121), we get a palindrome (12341014321).

The spelling of 12121002200 in words is "twelve billion, one hundred twenty-one million, two thousand, two hundred".