211311310321 has 4 divisors (see below), whose sum is σ = 211332662644. Its totient is φ = 211289958000.

The previous prime is 211311310289. The next prime is 211311310351. The reversal of 211311310321 is 123013113112.

211311310321 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 can be written as a sum of positive squares in 2 ways, for example, as 146927322721 + 64383987600 = 383311^2 + 253740^2 .

It is a cyclic number.

It is not a de Polignac number, because 211311310321 - 2⁵ = 211311310289 is a prime.

It is a super-2 number, since 2×211311310321² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (211311310351) 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, 10661310 + ... + 10681111.

It is an arithmetic number, because the mean of its divisors is an integer number (52833165661).

Almost surely, 2^211311310321 is an apocalyptic number.

It is an amenable number.

211311310321 is a deficient number, since it is larger than the sum of its proper divisors (21352323).

211311310321 is an equidigital number, since it uses as much as digits as its factorization.

211311310321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21352322.

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

Adding to 211311310321 its reverse (123013113112), we get a palindrome (334324423433).

The spelling of 211311310321 in words is "two hundred eleven billion, three hundred eleven million, three hundred ten thousand, three hundred twenty-one".