12218346313 has 2 divisors, whose sum is σ = 12218346314. Its totient is φ = 12218346312.

The previous prime is 12218346271. The next prime is 12218346317. The reversal of 12218346313 is 31364381221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8359079184 + 3859267129 = 91428^2 + 62123^2 .

It is an emirp because it is prime and its reverse (31364381221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12218346313 - 2¹⁷ = 12218215241 is a prime.

It is not a weakly prime, because it can be changed into another prime (12218346317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6109173156 + 6109173157.

It is an arithmetic number, because the mean of its divisors is an integer number (6109173157).

Almost surely, 2^12218346313 is an apocalyptic number.

It is an amenable number.

12218346313 is a deficient number, since it is larger than the sum of its proper divisors (1).

12218346313 is an equidigital number, since it uses as much as digits as its factorization.

12218346313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 34.

The spelling of 12218346313 in words is "twelve billion, two hundred eighteen million, three hundred forty-six thousand, three hundred thirteen".