323660111221 has 4 divisors (see below), whose sum is σ = 323698701100. Its totient is φ = 323621521344.

The previous prime is 323660111153. The next prime is 323660111249. The reversal of 323660111221 is 122111066323.

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 169064880625 + 154595230596 = 411175^2 + 393186^2 .

It is a cyclic number.

It is not a de Polignac number, because 323660111221 - 2¹⁹ = 323659586933 is a prime.

It is a super-2 number, since 2×323660111221² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 323660111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (323660111261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19282356 + ... + 19299133.

It is an arithmetic number, because the mean of its divisors is an integer number (80924675275).

Almost surely, 2^323660111221 is an apocalyptic number.

It is an amenable number.

323660111221 is a deficient number, since it is larger than the sum of its proper divisors (38589879).

323660111221 is an equidigital number, since it uses as much as digits as its factorization.

323660111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38589878.

The product of its (nonzero) digits is 2592, while the sum is 28.

Adding to 323660111221 its reverse (122111066323), we get a palindrome (445771177544).

The spelling of 323660111221 in words is "three hundred twenty-three billion, six hundred sixty million, one hundred eleven thousand, two hundred twenty-one".