212321213 has 8 divisors (see below), whose sum is σ = 230875008. Its totient is φ = 194084784.

The previous prime is 212321203. The next prime is 212321261. The reversal of 212321213 is 312123212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 212321213 - 2⁸ = 212320957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212321191 and 212321200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212321203) 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 7 ways as a sum of consecutive naturals, for example, 77945 + ... + 80622.

It is an arithmetic number, because the mean of its divisors is an integer number (28859376).

Almost surely, 2^212321213 is an apocalyptic number.

It is an amenable number.

212321213 is a deficient number, since it is larger than the sum of its proper divisors (18553795).

212321213 is a wasteful number, since it uses less digits than its factorization.

212321213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158683.

The product of its digits is 144, while the sum is 17.

The square root of 212321213 is about 14571.2461031993. The cubic root of 212321213 is about 596.5741927090.

Adding to 212321213 its reverse (312123212), we get a palindrome (524444425).

The spelling of 212321213 in words is "two hundred twelve million, three hundred twenty-one thousand, two hundred thirteen".