1321331311145 has 8 divisors (see below), whose sum is σ = 1588749857856. Its totient is φ = 1054963525936.

The previous prime is 1321331311061. The next prime is 1321331311159. The reversal of 1321331311145 is 5411131331231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1321331311145 - 2⁸ = 1321331310889 is a prime.

It is a super-2 number, since 2×1321331311145² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262687607 + ... + 262692636.

It is an arithmetic number, because the mean of its divisors is an integer number (198593732232).

Almost surely, 2^{1321331311145} is an apocalyptic number.

It is an amenable number.

1321331311145 is a deficient number, since it is larger than the sum of its proper divisors (267418546711).

1321331311145 is an equidigital number, since it uses as much as digits as its factorization.

1321331311145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525380751.

The product of its digits is 3240, while the sum is 29.

Adding to 1321331311145 its reverse (5411131331231), we get a palindrome (6732462642376).

The spelling of 1321331311145 in words is "one trillion, three hundred twenty-one billion, three hundred thirty-one million, three hundred eleven thousand, one hundred forty-five".