12533521013 has 4 divisors (see below), whose sum is σ = 13497638028. Its totient is φ = 11569404000.

The previous prime is 12533521003. The next prime is 12533521027. The reversal of 12533521013 is 31012533521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31012533521 = 3739 ⋅8294339.

It can be written as a sum of positive squares in 2 ways, for example, as 508863364 + 12024657649 = 22558^2 + 109657^2 .

It is a cyclic number.

It is not a de Polignac number, because 12533521013 - 2⁶ = 12533520949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12533521003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 482058488 + ... + 482058513.

It is an arithmetic number, because the mean of its divisors is an integer number (3374409507).

Almost surely, 2^12533521013 is an apocalyptic number.

12533521013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12533521013 is a deficient number, since it is larger than the sum of its proper divisors (964117015).

12533521013 is an equidigital number, since it uses as much as digits as its factorization.

12533521013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 964117014.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 12533521013 in words is "twelve billion, five hundred thirty-three million, five hundred twenty-one thousand, thirteen".