12321040424 has 64 divisors (see below), whose sum is σ = 28947456000. Its totient is φ = 4776235200.

The previous prime is 12321040379. The next prime is 12321040469. The reversal of 12321040424 is 42404012321.

It is an interprime number because it is at equal distance from previous prime (12321040379) and next prime (12321040469).

It is a self number, because there is not a number n which added to its sum of digits gives 12321040424.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72329 + ... + 172839.

It is an arithmetic number, because the mean of its divisors is an integer number (452304000).

Almost surely, 2^12321040424 is an apocalyptic number.

12321040424 is a gapful number since it is divisible by the number (14) 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 12321040424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14473728000).

12321040424 is an abundant number, since it is smaller than the sum of its proper divisors (16626415576).

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

12321040424 is a wasteful number, since it uses less digits than its factorization.

12321040424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100734 (or 100730 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 12321040424 its reverse (42404012321), we get a palindrome (54725052745).

The spelling of 12321040424 in words is "twelve billion, three hundred twenty-one million, forty thousand, four hundred twenty-four".