12134643121 has 2 divisors, whose sum is σ = 12134643122. Its totient is φ = 12134643120.

The previous prime is 12134643119. The next prime is 12134643139.

12134643121 is nontrivially palindromic in base 10.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9037164096 + 3097479025 = 95064^2 + 55655^2 .

It is a palprime.

It is a cyclic number.

It is not a de Polignac number, because 12134643121 - 2¹ = 12134643119 is a prime.

Together with 12134643119, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 12134643121.

It is not a weakly prime, because it can be changed into another prime (12134643161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6067321560 + 6067321561.

It is an arithmetic number, because the mean of its divisors is an integer number (6067321561).

Almost surely, 2^12134643121 is an apocalyptic number.

It is an amenable number.

12134643121 is a deficient number, since it is larger than the sum of its proper divisors (1).

12134643121 is an equidigital number, since it uses as much as digits as its factorization.

12134643121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 28.

The spelling of 12134643121 in words is "twelve billion, one hundred thirty-four million, six hundred forty-three thousand, one hundred twenty-one".