Adding to 12513263756375 its reverse (57365736231521), we get a palindrome (69878999987896).
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 12513263756375.
It is a congruent number.
It is an unprimeable number.
Almost surely, 212513263756375 is an apocalyptic number.
12513263756375 is an equidigital number, since it uses as much as digits as its factorization.
12513263756375 is an evil number, because the sum of its binary digits is even.
The spelling of 12513263756375 in words is "twelve trillion, five hundred thirteen billion, two hundred sixty-three million, seven hundred fifty-six thousand, three hundred seventy-five".