12534242209 has 2 divisors, whose sum is σ = 12534242210. Its totient is φ = 12534242208.

The previous prime is 12534242167. The next prime is 12534242263. The reversal of 12534242209 is 90224243521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11088721809 + 1445520400 = 105303^2 + 38020^2 .

It is an emirp because it is prime and its reverse (90224243521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12534242209 - 2⁹ = 12534241697 is a prime.

It is not a weakly prime, because it can be changed into another prime (12534242269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6267121104 + 6267121105.

It is an arithmetic number, because the mean of its divisors is an integer number (6267121105).

Almost surely, 2^12534242209 is an apocalyptic number.

It is an amenable number.

12534242209 is a deficient number, since it is larger than the sum of its proper divisors (1).

12534242209 is an equidigital number, since it uses as much as digits as its factorization.

12534242209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 34560, while the sum is 34.

The spelling of 12534242209 in words is "twelve billion, five hundred thirty-four million, two hundred forty-two thousand, two hundred nine".