213242224221 has 36 divisors (see below), whose sum is σ = 351087110400. Its totient is φ = 124319336544.

The previous prime is 213242224211. The next prime is 213242224241. The reversal of 213242224221 is 122422242312.

213242224221 is a `hidden beast` number, since 2 + 13 + 2 + 4 + 222 + 422 + 1 = 666.

It is not a de Polignac number, because 213242224221 - 2⁹ = 213242223709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213242224201) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 3660541 + ... + 3718338.

Almost surely, 2^213242224221 is an apocalyptic number.

It is an amenable number.

213242224221 is a deficient number, since it is larger than the sum of its proper divisors (137844886179).

213242224221 is a wasteful number, since it uses less digits than its factorization.

213242224221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7378930 (or 7378914 counting only the distinct ones).

The product of its digits is 6144, while the sum is 27.

Adding to 213242224221 its reverse (122422242312), we get a palindrome (335664466533).

The spelling of 213242224221 in words is "two hundred thirteen billion, two hundred forty-two million, two hundred twenty-four thousand, two hundred twenty-one".