12388488321 has 48 divisors (see below), whose sum is σ = 19213286400. Its totient is φ = 7080242400.

The previous prime is 12388488313. The next prime is 12388488323.

12388488321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12388488321 - 2³ = 12388488313 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12388488323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 582330 + ... + 603228.

It is an arithmetic number, because the mean of its divisors is an integer number (400276800).

Almost surely, 2^12388488321 is an apocalyptic number.

12388488321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12388488321 is a deficient number, since it is larger than the sum of its proper divisors (6824798079).

12388488321 is a wasteful number, since it uses less digits than its factorization.

12388488321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21018 (or 21007 counting only the distinct ones).

The product of its digits is 589824, while the sum is 48.

The spelling of 12388488321 in words is "twelve billion, three hundred eighty-eight million, four hundred eighty-eight thousand, three hundred twenty-one".