12200121220 has 48 divisors (see below), whose sum is σ = 29317760640. Its totient is φ = 4177545984.

The previous prime is 12200121191. The next prime is 12200121221. The reversal of 12200121220 is 2212100221.

It is a happy number.

12200121220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 12200121220.

It is not an unprimeable number, because it can be changed into a prime (12200121221) 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 15 ways as a sum of consecutive naturals, for example, 54816 + ... + 165544.

It is an arithmetic number, because the mean of its divisors is an integer number (610786680).

Almost surely, 2^12200121220 is an apocalyptic number.

12200121220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12200121220 is an abundant number, since it is smaller than the sum of its proper divisors (17117639420).

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

12200121220 is a wasteful number, since it uses less digits than its factorization.

12200121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111532 (or 111530 counting only the distinct ones).

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

Adding to 12200121220 its reverse (2212100221), we get a palindrome (14412221441).

The spelling of 12200121220 in words is "twelve billion, two hundred million, one hundred twenty-one thousand, two hundred twenty".