213223111211 has 4 divisors (see below), whose sum is σ = 232607030424. Its totient is φ = 193839192000.

The previous prime is 213223111207. The next prime is 213223111223. The reversal of 213223111211 is 112111322312.

213223111211 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 213223111211 - 2² = 213223111207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213223111271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9691959590 + ... + 9691959611.

It is an arithmetic number, because the mean of its divisors is an integer number (58151757606).

Almost surely, 2^213223111211 is an apocalyptic number.

213223111211 is a deficient number, since it is larger than the sum of its proper divisors (19383919213).

213223111211 is a wasteful number, since it uses less digits than its factorization.

213223111211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19383919212.

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

Adding to 213223111211 its reverse (112111322312), we get a palindrome (325334433523).

The spelling of 213223111211 in words is "two hundred thirteen billion, two hundred twenty-three million, one hundred eleven thousand, two hundred eleven".