1312313021213 has 2 divisors, whose sum is σ = 1312313021214. Its totient is φ = 1312313021212.

The previous prime is 1312313021189. The next prime is 1312313021231. The reversal of 1312313021213 is 3121203132131.

Together with next prime (1312313021231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 739259479204 + 573053542009 = 859802^2 + 757003^2 .

It is a cyclic number.

It is not a de Polignac number, because 1312313021213 - 2⁸ = 1312313020957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312313021273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656156510606 + 656156510607.

It is an arithmetic number, because the mean of its divisors is an integer number (656156510607).

Almost surely, 2^{1312313021213} is an apocalyptic number.

It is an amenable number.

1312313021213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312313021213 is an equidigital number, since it uses as much as digits as its factorization.

1312313021213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 23.

Adding to 1312313021213 its reverse (3121203132131), we get a palindrome (4433516153344).

The spelling of 1312313021213 in words is "one trillion, three hundred twelve billion, three hundred thirteen million, twenty-one thousand, two hundred thirteen".