Adding to 12513263756351 its reverse (15365736231521), we get a palindrome (27878999987872).
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-12513263756351 is a prime.
It is a self number, because there is not a number n which added to its sum of digits gives 12513263756351.
It is a congruent number.
Almost surely, 212513263756351 is an apocalyptic number.
12513263756351 is an equidigital number, since it uses as much as digits as its factorization.
12513263756351 is an odious number, because the sum of its binary digits is odd.
The spelling of 12513263756351 in words is "twelve trillion, five hundred thirteen billion, two hundred sixty-three million, seven hundred fifty-six thousand, three hundred fifty-one".