211321323311 has 16 divisors (see below), whose sum is σ = 249317314560. Its totient is φ = 175277917440.

The previous prime is 211321323289. The next prime is 211321323313. The reversal of 211321323311 is 113323123112.

It is a cyclic number.

It is not a de Polignac number, because 211321323311 - 2¹⁴ = 211321306927 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 (211321323313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5126495 + ... + 5167551.

It is an arithmetic number, because the mean of its divisors is an integer number (15582332160).

Almost surely, 2^211321323311 is an apocalyptic number.

211321323311 is a deficient number, since it is larger than the sum of its proper divisors (37995991249).

211321323311 is a wasteful number, since it uses less digits than its factorization.

211321323311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64814.

The product of its digits is 648, while the sum is 23.

Adding to 211321323311 its reverse (113323123112), we get a palindrome (324644446423).

The spelling of 211321323311 in words is "two hundred eleven billion, three hundred twenty-one million, three hundred twenty-three thousand, three hundred eleven".