1312100120321 has 8 divisors (see below), whose sum is σ = 1312804596264. Its totient is φ = 1311395754240.

The previous prime is 1312100120239. The next prime is 1312100120327. The reversal of 1312100120321 is 1230210012131.

It can be written as a sum of positive squares in 4 ways, for example, as 107429239696 + 1204670880625 = 327764^2 + 1097575^2 .

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 1312100120321 - 2¹⁸ = 1312099858177 is a prime.

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 1312100120321.

It is not an unprimeable number, because it can be changed into a prime (1312100120327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35713241 + ... + 35749961.

It is an arithmetic number, because the mean of its divisors is an integer number (164100574533).

Almost surely, 2^{1312100120321} is an apocalyptic number.

It is an amenable number.

1312100120321 is a deficient number, since it is larger than the sum of its proper divisors (704475943).

1312100120321 is a wasteful number, since it uses less digits than its factorization.

1312100120321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54931.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1312100120321 its reverse (1230210012131), we get a palindrome (2542310132452).

The spelling of 1312100120321 in words is "one trillion, three hundred twelve billion, one hundred million, one hundred twenty thousand, three hundred twenty-one".