12868657129 has 2 divisors, whose sum is σ = 12868657130. Its totient is φ = 12868657128.

The previous prime is 12868657111. The next prime is 12868657169. The reversal of 12868657129 is 92175686821.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10846805904 + 2021851225 = 104148^2 + 44965^2 .

It is a cyclic number.

It is not a de Polignac number, because 12868657129 - 2⁵ = 12868657097 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12868657129.

It is not a weakly prime, because it can be changed into another prime (12868657169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6434328564 + 6434328565.

It is an arithmetic number, because the mean of its divisors is an integer number (6434328565).

Almost surely, 2^12868657129 is an apocalyptic number.

It is an amenable number.

12868657129 is a deficient number, since it is larger than the sum of its proper divisors (1).

12868657129 is an equidigital number, since it uses as much as digits as its factorization.

12868657129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2903040, while the sum is 55.

The spelling of 12868657129 in words is "twelve billion, eight hundred sixty-eight million, six hundred fifty-seven thousand, one hundred twenty-nine".