1321320320001 has 48 divisors (see below), whose sum is σ = 2101156267392. Its totient is φ = 793467763200.

The previous prime is 1321320319973. The next prime is 1321320320027. The reversal of 1321320320001 is 1000230231231.

1321320320001 is a `hidden beast` number, since 1 + 3 + 21 + 320 + 320 + 0 + 0 + 1 = 666.

It is not a de Polignac number, because 1321320320001 - 2⁷ = 1321320319873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1321320320071) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40044156 + ... + 40077138.

It is an arithmetic number, because the mean of its divisors is an integer number (43774088904).

Almost surely, 2^{1321320320001} is an apocalyptic number.

1321320320001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1321320320001 is a deficient number, since it is larger than the sum of its proper divisors (779835947391).

1321320320001 is a wasteful number, since it uses less digits than its factorization.

1321320320001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36694 (or 36691 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 1321320320001 its reverse (1000230231231), we get a palindrome (2321550551232).

The spelling of 1321320320001 in words is "one trillion, three hundred twenty-one billion, three hundred twenty million, three hundred twenty thousand, one".