212310530281 has 2 divisors, whose sum is σ = 212310530282. Its totient is φ = 212310530280.

The previous prime is 212310530279. The next prime is 212310530309. The reversal of 212310530281 is 182035013212.

It is an a-pointer prime, because the next prime (212310530309) can be obtained adding 212310530281 to its sum of digits (28).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207465674256 + 4844856025 = 455484^2 + 69605^2 .

It is a cyclic number.

It is not a de Polignac number, because 212310530281 - 2¹ = 212310530279 is a prime.

It is a super-3 number, since 3×212310530281³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

Together with 212310530279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (212310530251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106155265140 + 106155265141.

It is an arithmetic number, because the mean of its divisors is an integer number (106155265141).

Almost surely, 2^212310530281 is an apocalyptic number.

It is an amenable number.

212310530281 is a deficient number, since it is larger than the sum of its proper divisors (1).

212310530281 is an equidigital number, since it uses as much as digits as its factorization.

212310530281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

Adding to 212310530281 its reverse (182035013212), we get a palindrome (394345543493).

The spelling of 212310530281 in words is "two hundred twelve billion, three hundred ten million, five hundred thirty thousand, two hundred eighty-one".