12281020209 has 12 divisors (see below), whose sum is σ = 17747730000. Its totient is φ = 8183433624.

The previous prime is 12281020207. The next prime is 12281020231. The reversal of 12281020209 is 90202018221.

12281020209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12281020209 - 2¹ = 12281020207 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12281020207) 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 11 ways as a sum of consecutive naturals, for example, 306159 + ... + 343940.

It is an arithmetic number, because the mean of its divisors is an integer number (1478977500).

Almost surely, 2^12281020209 is an apocalyptic number.

It is an amenable number.

12281020209 is a deficient number, since it is larger than the sum of its proper divisors (5466709791).

12281020209 is a wasteful number, since it uses less digits than its factorization.

12281020209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652204 (or 652201 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The spelling of 12281020209 in words is "twelve billion, two hundred eighty-one million, twenty thousand, two hundred nine".