1321331403324 has 24 divisors (see below), whose sum is σ = 3083125776640. Its totient is φ = 440441062704.

The previous prime is 1321331403307. The next prime is 1321331403397. The reversal of 1321331403324 is 4233041331231.

It is a junction number, because it is equal to n+sod(n) for n = 1321331403291 and 1321331403300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2886237 + ... + 3312555.

Almost surely, 2^{1321331403324} is an apocalyptic number.

It is an amenable number.

1321331403324 is an abundant number, since it is smaller than the sum of its proper divisors (1761794373316).

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

1321331403324 is a wasteful number, since it uses less digits than its factorization.

1321331403324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 684609 (or 684607 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 30.

Adding to 1321331403324 its reverse (4233041331231), we get a palindrome (5554372734555).

The spelling of 1321331403324 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, four hundred three thousand, three hundred twenty-four".