12120321313 has 4 divisors (see below), whose sum is σ = 12415938948. Its totient is φ = 11824703680.

The previous prime is 12120321299. The next prime is 12120321359. The reversal of 12120321313 is 31312302121.

12120321313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31312302121 = 3833 ⋅8169137.

It can be written as a sum of positive squares in 2 ways, for example, as 2535323904 + 9584997409 = 50352^2 + 97903^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12120321313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12120321613) 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 3 ways as a sum of consecutive naturals, for example, 147808756 + ... + 147808837.

It is an arithmetic number, because the mean of its divisors is an integer number (3103984737).

Almost surely, 2^12120321313 is an apocalyptic number.

It is an amenable number.

12120321313 is a deficient number, since it is larger than the sum of its proper divisors (295617635).

12120321313 is an equidigital number, since it uses as much as digits as its factorization.

12120321313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295617634.

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

Adding to 12120321313 its reverse (31312302121), we get a palindrome (43432623434).

The spelling of 12120321313 in words is "twelve billion, one hundred twenty million, three hundred twenty-one thousand, three hundred thirteen".