1321523520344 has 32 divisors (see below), whose sum is σ = 2544154507440. Its totient is φ = 643156761600.

The previous prime is 1321523520341. The next prime is 1321523520389. The reversal of 1321523520344 is 4430253251231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321523520341) 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 7 ways as a sum of consecutive naturals, for example, 4510442 + ... + 4794489.

Almost surely, 2^{1321523520344} is an apocalyptic number.

It is an amenable number.

1321523520344 is a deficient number, since it is larger than the sum of its proper divisors (1222630987096).

1321523520344 is a wasteful number, since it uses less digits than its factorization.

1321523520344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9305411 (or 9305407 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 35.

Adding to 1321523520344 its reverse (4430253251231), we get a palindrome (5751776771575).

The spelling of 1321523520344 in words is "one trillion, three hundred twenty-one billion, five hundred twenty-three million, five hundred twenty thousand, three hundred forty-four".