12321300040 has 128 divisors (see below), whose sum is σ = 32434421760. Its totient is φ = 4124738304.

The previous prime is 12321300011. The next prime is 12321300041. The reversal of 12321300040 is 4000312321.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12321299987 and 12321300023.

It is not an unprimeable number, because it can be changed into a prime (12321300041) 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, 7408249 + ... + 7409911.

It is an arithmetic number, because the mean of its divisors is an integer number (253393920).

Almost surely, 2^12321300040 is an apocalyptic number.

12321300040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12321300040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16217210880).

12321300040 is an abundant number, since it is smaller than the sum of its proper divisors (20113121720).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12321300040 is a wasteful number, since it uses less digits than its factorization.

12321300040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2291 (or 2287 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 12321300040 its reverse (4000312321), we get a palindrome (16321612361).

The spelling of 12321300040 in words is "twelve billion, three hundred twenty-one million, three hundred thousand, forty".