213231011311 has 4 divisors (see below), whose sum is σ = 213474149032. Its totient is φ = 212987873592.

The previous prime is 213231011303. The next prime is 213231011317. The reversal of 213231011311 is 113110132312.

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 213231011311 - 2³ = 213231011303 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 (213231011317) 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, 121567545 + ... + 121569298.

It is an arithmetic number, because the mean of its divisors is an integer number (53368537258).

Almost surely, 2^213231011311 is an apocalyptic number.

213231011311 is a deficient number, since it is larger than the sum of its proper divisors (243137721).

213231011311 is an equidigital number, since it uses as much as digits as its factorization.

213231011311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243137720.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 213231011311 its reverse (113110132312), we get a palindrome (326341143623).

The spelling of 213231011311 in words is "two hundred thirteen billion, two hundred thirty-one million, eleven thousand, three hundred eleven".