12871552321 has 4 divisors (see below), whose sum is σ = 12871863472. Its totient is φ = 12871241172.

The previous prime is 12871552319. The next prime is 12871552339. The reversal of 12871552321 is 12325517821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12325517821 = 12953 ⋅951557.

It is a cyclic number.

It is not a de Polignac number, because 12871552321 - 2¹ = 12871552319 is a prime.

It is a super-3 number, since 3×12871552321³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12871552301) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81891 + ... + 180136.

It is an arithmetic number, because the mean of its divisors is an integer number (3217965868).

Almost surely, 2^12871552321 is an apocalyptic number.

It is an amenable number.

12871552321 is a deficient number, since it is larger than the sum of its proper divisors (311151).

12871552321 is an equidigital number, since it uses as much as digits as its factorization.

12871552321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311150.

The product of its digits is 33600, while the sum is 37.

The spelling of 12871552321 in words is "twelve billion, eight hundred seventy-one million, five hundred fifty-two thousand, three hundred twenty-one".