1312120132013 has 4 divisors (see below), whose sum is σ = 1316013663900. Its totient is φ = 1308226600128.

The previous prime is 1312120132003. The next prime is 1312120132033. The reversal of 1312120132013 is 3102310212131.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 172260691849 + 1139859440164 = 415043^2 + 1067642^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312120132013 - 2¹² = 1312120127917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312120132003) 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, 1946765438 + ... + 1946766111.

It is an arithmetic number, because the mean of its divisors is an integer number (329003415975).

Almost surely, 2^{1312120132013} is an apocalyptic number.

It is an amenable number.

1312120132013 is a deficient number, since it is larger than the sum of its proper divisors (3893531887).

1312120132013 is an equidigital number, since it uses as much as digits as its factorization.

1312120132013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893531886.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1312120132013 its reverse (3102310212131), we get a palindrome (4414430344144).

The spelling of 1312120132013 in words is "one trillion, three hundred twelve billion, one hundred twenty million, one hundred thirty-two thousand, thirteen".