1321443413340 has 192 divisors, whose sum is σ = 3804363085824. Its totient is φ = 342595706112.

The previous prime is 1321443413321. The next prime is 1321443413357. The reversal of 1321443413340 is 433143441231.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 582902887 + ... + 582905153.

It is an arithmetic number, because the mean of its divisors is an integer number (19814391072).

Almost surely, 2^{1321443413340} is an apocalyptic number.

1321443413340 is a gapful number since it is divisible by the number (10) 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 1321443413340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1902181542912).

1321443413340 is an abundant number, since it is smaller than the sum of its proper divisors (2482919672484).

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

1321443413340 is a wasteful number, since it uses less digits than its factorization.

1321443413340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4176 (or 4174 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 33.

Adding to 1321443413340 its reverse (433143441231), we get a palindrome (1754586854571).

The spelling of 1321443413340 in words is "one trillion, three hundred twenty-one billion, four hundred forty-three million, four hundred thirteen thousand, three hundred forty".