213133231211 has 4 divisors (see below), whose sum is σ = 213134644392. Its totient is φ = 213131818032.

The previous prime is 213133231169. The next prime is 213133231273. The reversal of 213133231211 is 112132331312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213133231211 - 2¹⁰ = 213133230187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213133731211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 449081 + ... + 792426.

It is an arithmetic number, because the mean of its divisors is an integer number (53283661098).

Almost surely, 2^213133231211 is an apocalyptic number.

213133231211 is a deficient number, since it is larger than the sum of its proper divisors (1413181).

213133231211 is a wasteful number, since it uses less digits than its factorization.

213133231211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413180.

The product of its digits is 648, while the sum is 23.

Adding to 213133231211 its reverse (112132331312), we get a palindrome (325265562523).

The spelling of 213133231211 in words is "two hundred thirteen billion, one hundred thirty-three million, two hundred thirty-one thousand, two hundred eleven".