12345343554217 has 2 divisors, whose sum is σ = 12345343554218. Its totient is φ = 12345343554216.

The previous prime is 12345343554197. The next prime is 12345343554253. The reversal of 12345343554217 is 71245534354321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11471911254441 + 873432299776 = 3387021^2 + 934576^2 .

It is an emirp because it is prime and its reverse (71245534354321) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12345343554217 - 2¹⁵ = 12345343521449 is a prime.

It is not a weakly prime, because it can be changed into another prime (12345343554287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6172671777108 + 6172671777109.

It is an arithmetic number, because the mean of its divisors is an integer number (6172671777109).

Almost surely, 2^{12345343554217} is an apocalyptic number.

It is an amenable number.

12345343554217 is a deficient number, since it is larger than the sum of its proper divisors (1).

12345343554217 is an equidigital number, since it uses as much as digits as its factorization.

12345343554217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6048000, while the sum is 49.

The spelling of 12345343554217 in words is "twelve trillion, three hundred forty-five billion, three hundred forty-three million, five hundred fifty-four thousand, two hundred seventeen".