1321331012340 has 96 divisors (see below), whose sum is σ = 3703741458816. Its totient is φ = 351972864000.

The previous prime is 1321331012317. The next prime is 1321331012387. The reversal of 1321331012340 is 432101331231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321331012340.

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 31 ways as a sum of consecutive naturals, for example, 398830524 + ... + 398833836.

It is an arithmetic number, because the mean of its divisors is an integer number (38580640196).

Almost surely, 2^{1321331012340} is an apocalyptic number.

1321331012340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321331012340 is an abundant number, since it is smaller than the sum of its proper divisors (2382410446476).

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

1321331012340 is a wasteful number, since it uses less digits than its factorization.

1321331012340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8529 (or 8527 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1321331012340 its reverse (432101331231), we get a palindrome (1753432343571).

The spelling of 1321331012340 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, twelve thousand, three hundred forty".