1321431004344 has 256 divisors, whose sum is σ = 3787305984000. Its totient is φ = 380313331200.

The previous prime is 1321431004303. The next prime is 1321431004379. The reversal of 1321431004344 is 4434001341231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 557329479 + ... + 557331849.

It is an arithmetic number, because the mean of its divisors is an integer number (14794164000).

Almost surely, 2^{1321431004344} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321431004344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1893652992000).

1321431004344 is an abundant number, since it is smaller than the sum of its proper divisors (2465874979656).

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

1321431004344 is a wasteful number, since it uses less digits than its factorization.

1321431004344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3026 (or 3022 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 1321431004344 its reverse (4434001341231), we get a palindrome (5755432345575).

The spelling of 1321431004344 in words is "one trillion, three hundred twenty-one billion, four hundred thirty-one million, four thousand, three hundred forty-four".