12556282321 has 8 divisors (see below), whose sum is σ = 13989204864. Its totient is φ = 11171933520.

The previous prime is 12556282309. The next prime is 12556282363. The reversal of 12556282321 is 12328265521.

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

It is not a de Polignac number, because 12556282321 - 2⁹ = 12556281809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12556282121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12142890 + ... + 12143923.

It is an arithmetic number, because the mean of its divisors is an integer number (1748650608).

Almost surely, 2^12556282321 is an apocalyptic number.

12556282321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12556282321 is a deficient number, since it is larger than the sum of its proper divisors (1432922543).

12556282321 is a wasteful number, since it uses less digits than its factorization.

12556282321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24286871.

The product of its digits is 57600, while the sum is 37.

The spelling of 12556282321 in words is "twelve billion, five hundred fifty-six million, two hundred eighty-two thousand, three hundred twenty-one".