1312320321001 has 4 divisors (see below), whose sum is σ = 1381389811600. Its totient is φ = 1243250830404.

The previous prime is 1312320320977. The next prime is 1312320321023. The reversal of 1312320321001 is 1001230232131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1312320321001 - 2¹⁵ = 1312320288233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 69069490579 = 1312320321001 / (1 + 3 + 1 + 2 + 3 + 2 + 0 + 3 + 2 + 1 + 0 + 0 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1312320321001.

It is not an unprimeable number, because it can be changed into a prime (1312320321101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34534745271 + ... + 34534745308.

It is an arithmetic number, because the mean of its divisors is an integer number (345347452900).

Almost surely, 2^{1312320321001} is an apocalyptic number.

It is an amenable number.

1312320321001 is a deficient number, since it is larger than the sum of its proper divisors (69069490599).

1312320321001 is an equidigital number, since it uses as much as digits as its factorization.

1312320321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69069490598.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1312320321001 its reverse (1001230232131), we get a palindrome (2313550553132).

The spelling of 1312320321001 in words is "one trillion, three hundred twelve billion, three hundred twenty million, three hundred twenty-one thousand, one".