1321323314320 has 40 divisors (see below), whose sum is σ = 3171175960320. Its totient is φ = 511479991680.

The previous prime is 1321323314281. The next prime is 1321323314341. The reversal of 1321323314320 is 234133231231.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 266393350 + ... + 266398309.

It is an arithmetic number, because the mean of its divisors is an integer number (79279399008).

Almost surely, 2^{1321323314320} is an apocalyptic number.

1321323314320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321323314320 is an abundant number, since it is smaller than the sum of its proper divisors (1849852646000).

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

1321323314320 is a wasteful number, since it uses less digits than its factorization.

1321323314320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 532791703 (or 532791697 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 1321323314320 its reverse (234133231231), we get a palindrome (1555456545551).

The spelling of 1321323314320 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-three million, three hundred fourteen thousand, three hundred twenty".