213213111213 has 4 divisors (see below), whose sum is σ = 284284148288. Its totient is φ = 142142074140.

The previous prime is 213213111197. The next prime is 213213111217. The reversal of 213213111213 is 312111312312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 213213111213 - 2⁴ = 213213111197 is a prime.

It is a Duffinian number.

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 213213111213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213213111217) 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, 35535518533 + ... + 35535518538.

It is an arithmetic number, because the mean of its divisors is an integer number (71071037072).

Almost surely, 2^213213111213 is an apocalyptic number.

It is an amenable number.

213213111213 is a deficient number, since it is larger than the sum of its proper divisors (71071037075).

213213111213 is an equidigital number, since it uses as much as digits as its factorization.

213213111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71071037074.

The product of its digits is 216, while the sum is 21.

Adding to 213213111213 its reverse (312111312312), we get a palindrome (525324423525).

The spelling of 213213111213 in words is "two hundred thirteen billion, two hundred thirteen million, one hundred eleven thousand, two hundred thirteen".