213132334221 has 24 divisors (see below), whose sum is σ = 321582456000. Its totient is φ = 135766832256.

The previous prime is 213132334213. The next prime is 213132334237. The reversal of 213132334221 is 122433231312.

213132334221 is a `hidden beast` number, since 2 + 1 + 3 + 1 + 3 + 233 + 422 + 1 = 666.

It is not a de Polignac number, because 213132334221 - 2³ = 213132334213 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213132334211) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 347596 + ... + 739653.

It is an arithmetic number, because the mean of its divisors is an integer number (13399269000).

Almost surely, 2^213132334221 is an apocalyptic number.

It is an amenable number.

213132334221 is a deficient number, since it is larger than the sum of its proper divisors (108450121779).

213132334221 is a wasteful number, since it uses less digits than its factorization.

213132334221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1088225 (or 1088222 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

Adding to 213132334221 its reverse (122433231312), we get a palindrome (335565565533).

The spelling of 213132334221 in words is "two hundred thirteen billion, one hundred thirty-two million, three hundred thirty-four thousand, two hundred twenty-one".