12218805541273 has 2 divisors, whose sum is σ = 12218805541274. Its totient is φ = 12218805541272.

The previous prime is 12218805541247. The next prime is 12218805541279. The reversal of 12218805541273 is 37214550881221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11903272812544 + 315532728729 = 3450112^2 + 561723^2 .

It is a cyclic number.

It is not a de Polignac number, because 12218805541273 - 2²¹ = 12218803444121 is a prime.

It is not a weakly prime, because it can be changed into another prime (12218805541279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6109402770636 + 6109402770637.

It is an arithmetic number, because the mean of its divisors is an integer number (6109402770637).

Almost surely, 2^{12218805541273} is an apocalyptic number.

It is an amenable number.

12218805541273 is a deficient number, since it is larger than the sum of its proper divisors (1).

12218805541273 is an equidigital number, since it uses as much as digits as its factorization.

12218805541273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1075200, while the sum is 49.

The spelling of 12218805541273 in words is "twelve trillion, two hundred eighteen billion, eight hundred five million, five hundred forty-one thousand, two hundred seventy-three".