213214221 has 64 divisors (see below), whose sum is σ = 368928000. Its totient is φ = 121271040.

The previous prime is 213214189. The next prime is 213214247. The reversal of 213214221 is 122412312.

It is a happy number.

It is not a de Polignac number, because 213214221 - 2⁵ = 213214189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213214194 and 213214203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213214291) 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 in 63 ways as a sum of consecutive naturals, for example, 610755 + ... + 611103.

It is an arithmetic number, because the mean of its divisors is an integer number (5764500).

Almost surely, 2^213214221 is an apocalyptic number.

It is an amenable number.

213214221 is a deficient number, since it is larger than the sum of its proper divisors (155713779).

213214221 is a wasteful number, since it uses less digits than its factorization.

213214221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408 (or 380 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 213214221 is about 14601.8567654939. The cubic root of 213214221 is about 597.4094058009.

Adding to 213214221 its reverse (122412312), we get a palindrome (335626533).

The spelling of 213214221 in words is "two hundred thirteen million, two hundred fourteen thousand, two hundred twenty-one".