12555025434321 has 8 divisors (see below), whose sum is σ = 16740722078880. Its totient is φ = 8369672872992.

The previous prime is 12555025434319. The next prime is 12555025434331. The reversal of 12555025434321 is 12343452055521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12555025434321 - 2¹ = 12555025434319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12555025434331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 85935655 + ... + 86081628.

It is an arithmetic number, because the mean of its divisors is an integer number (2092590259860).

Almost surely, 2^{12555025434321} is an apocalyptic number.

It is an amenable number.

12555025434321 is a deficient number, since it is larger than the sum of its proper divisors (4185696644559).

12555025434321 is a wasteful number, since it uses less digits than its factorization.

12555025434321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172041615.

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 12555025434321 its reverse (12343452055521), we get a palindrome (24898477489842).

The spelling of 12555025434321 in words is "twelve trillion, five hundred fifty-five billion, twenty-five million, four hundred thirty-four thousand, three hundred twenty-one".