211321331311 has 4 divisors (see below), whose sum is σ = 218608273800. Its totient is φ = 204034388824.

The previous prime is 211321331279. The next prime is 211321331323. The reversal of 211321331311 is 113133123112.

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 211321331311 - 2⁵ = 211321331279 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 (211321331411) 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, 3643471201 + ... + 3643471258.

It is an arithmetic number, because the mean of its divisors is an integer number (54652068450).

Almost surely, 2^211321331311 is an apocalyptic number.

211321331311 is a deficient number, since it is larger than the sum of its proper divisors (7286942489).

211321331311 is an equidigital number, since it uses as much as digits as its factorization.

211321331311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286942488.

The product of its digits is 324, while the sum is 22.

Adding to 211321331311 its reverse (113133123112), we get a palindrome (324454454423).

The spelling of 211321331311 in words is "two hundred eleven billion, three hundred twenty-one million, three hundred thirty-one thousand, three hundred eleven".