12213122213 has 2 divisors, whose sum is σ = 12213122214. Its totient is φ = 12213122212.

The previous prime is 12213122143. The next prime is 12213122231. The reversal of 12213122213 is 31222131221.

Together with next prime (12213122231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9548807524 + 2664314689 = 97718^2 + 51617^2 .

It is an emirp because it is prime and its reverse (31222131221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12213122213 - 2¹⁶ = 12213056677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12213122293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106561106 + 6106561107.

It is an arithmetic number, because the mean of its divisors is an integer number (6106561107).

Almost surely, 2^12213122213 is an apocalyptic number.

It is an amenable number.

12213122213 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213122213 is an equidigital number, since it uses as much as digits as its factorization.

12213122213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 20.

Adding to 12213122213 its reverse (31222131221), we get a palindrome (43435253434).

The spelling of 12213122213 in words is "twelve billion, two hundred thirteen million, one hundred twenty-two thousand, two hundred thirteen".