12321440340 has 96 divisors (see below), whose sum is σ = 39617303040. Its totient is φ = 2829801600.

The previous prime is 12321440311. The next prime is 12321440363. The reversal of 12321440340 is 4304412321.

It is a self number, because there is not a number n which added to its sum of digits gives 12321440340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 478746 + ... + 503825.

It is an arithmetic number, because the mean of its divisors is an integer number (412680240).

Almost surely, 2^12321440340 is an apocalyptic number.

12321440340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12321440340 is an abundant number, since it is smaller than the sum of its proper divisors (27295862700).

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

12321440340 is a wasteful number, since it uses less digits than its factorization.

12321440340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 982613 (or 982611 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 12321440340 its reverse (4304412321), we get a palindrome (16625852661).

The spelling of 12321440340 in words is "twelve billion, three hundred twenty-one million, four hundred forty thousand, three hundred forty".