12532400423521 has 32 divisors (see below), whose sum is σ = 14787257522688. Its totient is φ = 10494709674240.

The previous prime is 12532400423507. The next prime is 12532400423651.

12532400423521 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12532400423521 - 2²⁵ = 12532366869089 is a prime.

It is a super-2 number, since 2×12532400423521² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12532400420521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2112375 + ... + 5433868.

It is an arithmetic number, because the mean of its divisors is an integer number (462101797584).

Almost surely, 2^{12532400423521} is an apocalyptic number.

12532400423521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12532400423521 is a deficient number, since it is larger than the sum of its proper divisors (2254857099167).

12532400423521 is a wasteful number, since it uses less digits than its factorization.

12532400423521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7546461.

The product of its (nonzero) digits is 57600, while the sum is 34.

It can be divided in two parts, 12532400 and 423521, that added together give a palindrome (12955921).

The spelling of 12532400423521 in words is "twelve trillion, five hundred thirty-two billion, four hundred million, four hundred twenty-three thousand, five hundred twenty-one".