231012000209 has 2 divisors, whose sum is σ = 231012000210. Its totient is φ = 231012000208.

The previous prime is 231012000199. The next prime is 231012000221. The reversal of 231012000209 is 902000210132.

231012000209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 148271203600 + 82740796609 = 385060^2 + 287647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231012000209 is a prime.

It is not a weakly prime, because it can be changed into another prime (231012000259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115506000104 + 115506000105.

It is an arithmetic number, because the mean of its divisors is an integer number (115506000105).

Almost surely, 2^231012000209 is an apocalyptic number.

It is an amenable number.

231012000209 is a deficient number, since it is larger than the sum of its proper divisors (1).

231012000209 is an equidigital number, since it uses as much as digits as its factorization.

231012000209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

The spelling of 231012000209 in words is "two hundred thirty-one billion, twelve million, two hundred nine", and thus it is an aban number.