213232211111 has 4 divisors (see below), whose sum is σ = 215343421224. Its totient is φ = 211121001000.

The previous prime is 213232211039. The next prime is 213232211173. The reversal of 213232211111 is 111112232312.

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 213232211111 - 2¹⁸ = 213231948967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213232211611) 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, 1055604905 + ... + 1055605106.

It is an arithmetic number, because the mean of its divisors is an integer number (53835855306).

Almost surely, 2^213232211111 is an apocalyptic number.

213232211111 is a deficient number, since it is larger than the sum of its proper divisors (2111210113).

213232211111 is a wasteful number, since it uses less digits than its factorization.

213232211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111210112.

The product of its digits is 144, while the sum is 20.

Adding to 213232211111 its reverse (111112232312), we get a palindrome (324344443423).

The spelling of 213232211111 in words is "two hundred thirteen billion, two hundred thirty-two million, two hundred eleven thousand, one hundred eleven".