12440213441321 has 4 divisors (see below), whose sum is σ = 13094961517200. Its totient is φ = 11785465365444.

The previous prime is 12440213441317. The next prime is 12440213441333. The reversal of 12440213441321 is 12314431204421.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12440213441321 - 2² = 12440213441317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12440213441221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327374037911 + ... + 327374037948.

It is an arithmetic number, because the mean of its divisors is an integer number (3273740379300).

Almost surely, 2^{12440213441321} is an apocalyptic number.

It is an amenable number.

12440213441321 is a deficient number, since it is larger than the sum of its proper divisors (654748075879).

12440213441321 is an equidigital number, since it uses as much as digits as its factorization.

12440213441321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 654748075878.

The product of its (nonzero) digits is 18432, while the sum is 32.

Adding to 12440213441321 its reverse (12314431204421), we get a palindrome (24754644645742).

The spelling of 12440213441321 in words is "twelve trillion, four hundred forty billion, two hundred thirteen million, four hundred forty-one thousand, three hundred twenty-one".