213211211323311 has 12 divisors (see below), whose sum is σ = 319378110789192. Its totient is φ = 142140807548712.

The previous prime is 213211211323307. The next prime is 213211211323333. The reversal of 213211211323311 is 113323112112312.

213211211323311 is a `hidden beast` number, since 2 + 1 + 3 + 2 + 1 + 1 + 21 + 1 + 323 + 311 = 666.

It is not a de Polignac number, because 213211211323311 - 2² = 213211211323307 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213211211323391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 438706195896 + ... + 438706196381.

It is an arithmetic number, because the mean of its divisors is an integer number (26614842565766).

Almost surely, 2^{213211211323311} is an apocalyptic number.

213211211323311 is a deficient number, since it is larger than the sum of its proper divisors (106166899465881).

213211211323311 is an frugal number, since it uses more digits than its factorization.

213211211323311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877412392292 (or 877412392280 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

Adding to 213211211323311 its reverse (113323112112312), we get a palindrome (326534323435623).

The spelling of 213211211323311 in words is "two hundred thirteen trillion, two hundred eleven billion, two hundred eleven million, three hundred twenty-three thousand, three hundred eleven".