212333013281 has 2 divisors, whose sum is σ = 212333013282. Its totient is φ = 212333013280.

The previous prime is 212333013251. The next prime is 212333013337. The reversal of 212333013281 is 182310333212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 186983597056 + 25349416225 = 432416^2 + 159215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212333013281 is a prime.

It is a super-2 number, since 2×212333013281² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (212333013241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106166506640 + 106166506641.

It is an arithmetic number, because the mean of its divisors is an integer number (106166506641).

Almost surely, 2^212333013281 is an apocalyptic number.

It is an amenable number.

212333013281 is a deficient number, since it is larger than the sum of its proper divisors (1).

212333013281 is an equidigital number, since it uses as much as digits as its factorization.

212333013281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 29.

Adding to 212333013281 its reverse (182310333212), we get a palindrome (394643346493).

The spelling of 212333013281 in words is "two hundred twelve billion, three hundred thirty-three million, thirteen thousand, two hundred eighty-one".