212012331317 has 2 divisors, whose sum is σ = 212012331318. Its totient is φ = 212012331316.

The previous prime is 212012331301. The next prime is 212012331331. The reversal of 212012331317 is 713133210212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140324410801 + 71687920516 = 374599^2 + 267746^2 .

It is a cyclic number.

It is not a de Polignac number, because 212012331317 - 2⁴ = 212012331301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212012331337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106006165658 + 106006165659.

It is an arithmetic number, because the mean of its divisors is an integer number (106006165659).

Almost surely, 2^212012331317 is an apocalyptic number.

It is an amenable number.

212012331317 is a deficient number, since it is larger than the sum of its proper divisors (1).

212012331317 is an equidigital number, since it uses as much as digits as its factorization.

212012331317 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 212012331317 its reverse (713133210212), we get a palindrome (925145541529).

The spelling of 212012331317 in words is "two hundred twelve billion, twelve million, three hundred thirty-one thousand, three hundred seventeen".