12355332521 has 16 divisors (see below), whose sum is σ = 15376099200. Its totient is φ = 9686936448.

The previous prime is 12355332499. The next prime is 12355332523. The reversal of 12355332521 is 12523355321.

It is not a de Polignac number, because 12355332521 - 2¹⁰ = 12355331497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12355332523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1597820 + ... + 1605533.

It is an arithmetic number, because the mean of its divisors is an integer number (961006200).

Almost surely, 2^12355332521 is an apocalyptic number.

It is an amenable number.

12355332521 is a deficient number, since it is larger than the sum of its proper divisors (3020766679).

12355332521 is a wasteful number, since it uses less digits than its factorization.

12355332521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3203408.

The product of its digits is 27000, while the sum is 32.

Adding to 12355332521 its reverse (12523355321), we get a palindrome (24878687842).

The spelling of 12355332521 in words is "twelve billion, three hundred fifty-five million, three hundred thirty-two thousand, five hundred twenty-one".