12321201210440 has 64 divisors (see below), whose sum is σ = 28474577794800. Its totient is φ = 4794838253568.

The previous prime is 12321201210431. The next prime is 12321201210497. The reversal of 12321201210440 is 4401210212321.

It can be written as a sum of positive squares in 8 ways, for example, as 8661119508484 + 3660081701956 = 2942978^2 + 1913134^2 .

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, 15987896 + ... + 16740824.

Almost surely, 2^{12321201210440} is an apocalyptic number.

12321201210440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12321201210440 is an abundant number, since it is smaller than the sum of its proper divisors (16153376584360).

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

12321201210440 is a wasteful number, since it uses less digits than its factorization.

12321201210440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764034 (or 764030 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

Adding to 12321201210440 its reverse (4401210212321), we get a palindrome (16722411422761).

The spelling of 12321201210440 in words is "twelve trillion, three hundred twenty-one billion, two hundred one million, two hundred ten thousand, four hundred forty".