12213565129 has 2 divisors, whose sum is σ = 12213565130. Its totient is φ = 12213565128.

The previous prime is 12213565079. The next prime is 12213565159. The reversal of 12213565129 is 92156531221.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12127075129 + 86490000 = 110123^2 + 9300^2 .

It is an emirp because it is prime and its reverse (92156531221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12213565129 - 2¹¹ = 12213563081 is a prime.

It is not a weakly prime, because it can be changed into another prime (12213565159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6106782564 + 6106782565.

It is an arithmetic number, because the mean of its divisors is an integer number (6106782565).

Almost surely, 2^12213565129 is an apocalyptic number.

It is an amenable number.

12213565129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12213565129 is an equidigital number, since it uses as much as digits as its factorization.

12213565129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32400, while the sum is 37.

The spelling of 12213565129 in words is "twelve billion, two hundred thirteen million, five hundred sixty-five thousand, one hundred twenty-nine".