213202221 has 8 divisors (see below), whose sum is σ = 293439744. Its totient is φ = 137549760.

The previous prime is 213202181. The next prime is 213202247. The reversal of 213202221 is 122202312.

It is a happy number.

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

It is not a de Polignac number, because 213202221 - 2¹¹ = 213200173 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213202261) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1146156 + ... + 1146341.

It is an arithmetic number, because the mean of its divisors is an integer number (36679968).

Almost surely, 2^213202221 is an apocalyptic number.

It is an amenable number.

213202221 is a deficient number, since it is larger than the sum of its proper divisors (80237523).

213202221 is a wasteful number, since it uses less digits than its factorization.

213202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2292531.

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 213202221 is about 14601.4458530654. The cubic root of 213202221 is about 597.3981979066.

Adding to 213202221 its reverse (122202312), we get a palindrome (335404533).

Subtracting from 213202221 its reverse (122202312), we obtain a palindrome (90999909).

The spelling of 213202221 in words is "two hundred thirteen million, two hundred two thousand, two hundred twenty-one".