12321063531535 has 48 divisors (see below), whose sum is σ = 16761697255296. Its totient is φ = 8683283840000.

The previous prime is 12321063531529. The next prime is 12321063531589. The reversal of 12321063531535 is 53513536012321.

It is not a de Polignac number, because 12321063531535 - 2¹⁵ = 12321063498767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 726855 + ... + 5017015.

It is an arithmetic number, because the mean of its divisors is an integer number (349202026152).

Almost surely, 2^{12321063531535} is an apocalyptic number.

12321063531535 is a deficient number, since it is larger than the sum of its proper divisors (4440633723761).

12321063531535 is a wasteful number, since it uses less digits than its factorization.

12321063531535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290336 (or 4290325 counting only the distinct ones).

The product of its (nonzero) digits is 243000, while the sum is 40.

Adding to 12321063531535 its reverse (53513536012321), we get a palindrome (65834599543856).

The spelling of 12321063531535 in words is "twelve trillion, three hundred twenty-one billion, sixty-three million, five hundred thirty-one thousand, five hundred thirty-five".