12353533521 has 12 divisors (see below), whose sum is σ = 19160582832. Its totient is φ = 7059161928.

The previous prime is 12353533447. The next prime is 12353533559. The reversal of 12353533521 is 12533535321.

12353533521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12353533521 - 2⁷ = 12353533393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12353513521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 42018675 + ... + 42018968.

It is an arithmetic number, because the mean of its divisors is an integer number (1596715236).

Almost surely, 2^12353533521 is an apocalyptic number.

It is an amenable number.

12353533521 is a deficient number, since it is larger than the sum of its proper divisors (6807049311).

12353533521 is an equidigital number, since it uses as much as digits as its factorization.

12353533521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84037660 (or 84037653 counting only the distinct ones).

The product of its digits is 40500, while the sum is 33.

The spelling of 12353533521 in words is "twelve billion, three hundred fifty-three million, five hundred thirty-three thousand, five hundred twenty-one".