312211343182213 has 2 divisors, whose sum is σ = 312211343182214. Its totient is φ = 312211343182212.

The previous prime is 312211343182201. The next prime is 312211343182231. The reversal of 312211343182213 is 312281343112213.

Together with next prime (312211343182231) 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., 255190465001124 + 57020878181089 = 15974682^2 + 7551217^2 .

It is a cyclic number.

It is not a de Polignac number, because 312211343182213 - 2⁴⁵ = 277026971093381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312211343182283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156105671591106 + 156105671591107.

It is an arithmetic number, because the mean of its divisors is an integer number (156105671591107).

Almost surely, 2^{312211343182213} is an apocalyptic number.

It is an amenable number.

312211343182213 is a deficient number, since it is larger than the sum of its proper divisors (1).

312211343182213 is an equidigital number, since it uses as much as digits as its factorization.

312211343182213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 37.

Adding to 312211343182213 its reverse (312281343112213), we get a palindrome (624492686294426).

The spelling of 312211343182213 in words is "three hundred twelve trillion, two hundred eleven billion, three hundred forty-three million, one hundred eighty-two thousand, two hundred thirteen".