213344213221 has 2 divisors, whose sum is σ = 213344213222. Its totient is φ = 213344213220.

The previous prime is 213344213207. The next prime is 213344213249. The reversal of 213344213221 is 122312443312.

213344213221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (213344213249) can be obtained adding 213344213221 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., 138897090721 + 74447122500 = 372689^2 + 272850^2 .

It is a cyclic number.

It is not a de Polignac number, because 213344213221 - 2¹³ = 213344205029 is a prime.

It is a super-2 number, since 2×213344213221² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 213344213221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213342213221) 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, 106672106610 + 106672106611.

It is an arithmetic number, because the mean of its divisors is an integer number (106672106611).

Almost surely, 2^213344213221 is an apocalyptic number.

It is an amenable number.

213344213221 is a deficient number, since it is larger than the sum of its proper divisors (1).

213344213221 is an equidigital number, since it uses as much as digits as its factorization.

213344213221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 28.

Adding to 213344213221 its reverse (122312443312), we get a palindrome (335656656533).

The spelling of 213344213221 in words is "two hundred thirteen billion, three hundred forty-four million, two hundred thirteen thousand, two hundred twenty-one".