1312310213 has 2 divisors, whose sum is σ = 1312310214. Its totient is φ = 1312310212.

The previous prime is 1312310203. The next prime is 1312310231. The reversal of 1312310213 is 3120132131.

Together with next prime (1312310231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 965531329 + 346778884 = 31073^2 + 18622^2 .

It is an emirp because it is prime and its reverse (3120132131) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312310213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1312310191 and 1312310200.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1312310203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656155106 + 656155107.

It is an arithmetic number, because the mean of its divisors is an integer number (656155107).

Almost surely, 2^1312310213 is an apocalyptic number.

It is an amenable number.

1312310213 is a deficient number, since it is larger than the sum of its proper divisors (1).

1312310213 is an equidigital number, since it uses as much as digits as its factorization.

1312310213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1312310213 is about 36225.8224613327. The cubic root of 1312310213 is about 1094.8270093615.

Adding to 1312310213 its reverse (3120132131), we get a palindrome (4432442344).

The spelling of 1312310213 in words is "one billion, three hundred twelve million, three hundred ten thousand, two hundred thirteen".