12217195220 has 12 divisors (see below), whose sum is σ = 25656110004. Its totient is φ = 4886878080.

The previous prime is 12217195169. The next prime is 12217195241. The reversal of 12217195220 is 2259171221.

12217195220 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 2 ways, for example, as 5007826756 + 7209368464 = 70766^2 + 84908^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 305429861 + ... + 305429900.

It is an arithmetic number, because the mean of its divisors is an integer number (2138009167).

Almost surely, 2^12217195220 is an apocalyptic number.

12217195220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12217195220 is an abundant number, since it is smaller than the sum of its proper divisors (13438914784).

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

12217195220 is a wasteful number, since it uses less digits than its factorization.

12217195220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610859770 (or 610859768 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The spelling of 12217195220 in words is "twelve billion, two hundred seventeen million, one hundred ninety-five thousand, two hundred twenty".