321100221311 has 4 divisors (see below), whose sum is σ = 321178714824. Its totient is φ = 321021727800.

The previous prime is 321100221271. The next prime is 321100221313. The reversal of 321100221311 is 113122001123.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321100221311 is a prime.

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 321100221311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321100221313) 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, 39240620 + ... + 39248801.

It is an arithmetic number, because the mean of its divisors is an integer number (80294678706).

Almost surely, 2^321100221311 is an apocalyptic number.

321100221311 is a deficient number, since it is larger than the sum of its proper divisors (78493513).

321100221311 is an equidigital number, since it uses as much as digits as its factorization.

321100221311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78493512.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 321100221311 its reverse (113122001123), we get a palindrome (434222222434).

The spelling of 321100221311 in words is "three hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, three hundred eleven".