213220430281 has 2 divisors, whose sum is σ = 213220430282. Its totient is φ = 213220430280.

The previous prime is 213220430279. The next prime is 213220430377. The reversal of 213220430281 is 182034022312.

213220430281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 153460227600 + 59760202681 = 391740^2 + 244459^2 .

It is a cyclic number.

It is not a de Polignac number, because 213220430281 - 2¹ = 213220430279 is a prime.

It is a super-2 number, since 2×213220430281² (a number of 23 digits) contains 22 as substring.

Together with 213220430279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (213220230281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106610215140 + 106610215141.

It is an arithmetic number, because the mean of its divisors is an integer number (106610215141).

Almost surely, 2^213220430281 is an apocalyptic number.

It is an amenable number.

213220430281 is a deficient number, since it is larger than the sum of its proper divisors (1).

213220430281 is an equidigital number, since it uses as much as digits as its factorization.

213220430281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4608, while the sum is 28.

Adding to 213220430281 its reverse (182034022312), we get a palindrome (395254452593).

The spelling of 213220430281 in words is "two hundred thirteen billion, two hundred twenty million, four hundred thirty thousand, two hundred eighty-one".