212221304213 has 16 divisors (see below), whose sum is σ = 230692055040. Its totient is φ = 194486022000.

The previous prime is 212221304201. The next prime is 212221304257. The reversal of 212221304213 is 312403122212.

It is a cyclic number.

It is not a de Polignac number, because 212221304213 - 2¹⁸ = 212221042069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221303213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1380038 + ... + 1526088.

It is an arithmetic number, because the mean of its divisors is an integer number (14418253440).

Almost surely, 2^212221304213 is an apocalyptic number.

It is an amenable number.

212221304213 is a deficient number, since it is larger than the sum of its proper divisors (18470750827).

212221304213 is a wasteful number, since it uses less digits than its factorization.

212221304213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148568.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 212221304213 its reverse (312403122212), we get a palindrome (524624426425).

The spelling of 212221304213 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred four thousand, two hundred thirteen".