Adding to 312132311302321 its reverse (123203113231213), we get a palindrome (435335424533534).
It is a semiprime because it is the product of two primes.
It is a cyclic number.
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 312132311302321.
Almost surely, 2312132311302321 is an apocalyptic number.
It is an amenable number.
312132311302321 is an equidigital number, since it uses as much as digits as its factorization.
312132311302321 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 320608370.
The spelling of 312132311302321 in words is "three hundred twelve trillion, one hundred thirty-two billion, three hundred eleven million, three hundred two thousand, three hundred twenty-one".