1312220322321 has 8 divisors (see below), whose sum is σ = 1749633474144. Its totient is φ = 874810359360.

The previous prime is 1312220322317. The next prime is 1312220322331. The reversal of 1312220322321 is 1232230222131.

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

It is not a de Polignac number, because 1312220322321 - 2² = 1312220322317 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1312220322291 and 1312220322300.

It is not an unprimeable number, because it can be changed into a prime (1312220322311) by changing a digit.

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, 435070 + ... + 1677416.

It is an arithmetic number, because the mean of its divisors is an integer number (218704184268).

Almost surely, 2^{1312220322321} is an apocalyptic number.

It is an amenable number.

1312220322321 is a deficient number, since it is larger than the sum of its proper divisors (437413151823).

1312220322321 is a wasteful number, since it uses less digits than its factorization.

1312220322321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1594431.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1312220322321 its reverse (1232230222131), we get a palindrome (2544450544452).

The spelling of 1312220322321 in words is "one trillion, three hundred twelve billion, two hundred twenty million, three hundred twenty-two thousand, three hundred twenty-one".