211323332309 has 4 divisors (see below), whose sum is σ = 211324349004. Its totient is φ = 211322315616.

The previous prime is 211323332279. The next prime is 211323332323. The reversal of 211323332309 is 903233323112.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 145125188209 + 66198144100 = 380953^2 + 257290^2 .

It is a cyclic number.

It is not a de Polignac number, because 211323332309 - 2¹⁶ = 211323266773 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 (211323332509) 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, 71342 + ... + 654015.

It is an arithmetic number, because the mean of its divisors is an integer number (52831087251).

Almost surely, 2^211323332309 is an apocalyptic number.

It is an amenable number.

211323332309 is a deficient number, since it is larger than the sum of its proper divisors (1016695).

211323332309 is an equidigital number, since it uses as much as digits as its factorization.

211323332309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1016694.

The product of its (nonzero) digits is 17496, while the sum is 32.

It can be divided in two parts, 2 and 11323332309, that added together give a palindrome (11323332311).

The spelling of 211323332309 in words is "two hundred eleven billion, three hundred twenty-three million, three hundred thirty-two thousand, three hundred nine".