311222221003321 has 4 divisors (see below), whose sum is σ = 311359383729700. Its totient is φ = 311085058276944.

The previous prime is 311222221003219. The next prime is 311222221003327. The reversal of 311222221003321 is 123300122222113.

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 50570075677696 + 260652145325625 = 7111264^2 + 16144725^2 .

It is a cyclic number.

It is not a de Polignac number, because 311222221003321 - 2⁹ = 311222221002809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311222221003327) 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, 68581359786 + ... + 68581364323.

It is an arithmetic number, because the mean of its divisors is an integer number (77839845932425).

Almost surely, 2^{311222221003321} is an apocalyptic number.

It is an amenable number.

311222221003321 is a deficient number, since it is larger than the sum of its proper divisors (137162726379).

311222221003321 is a wasteful number, since it uses less digits than its factorization.

311222221003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 137162726378.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 311222221003321 its reverse (123300122222113), we get a palindrome (434522343225434).

The spelling of 311222221003321 in words is "three hundred eleven trillion, two hundred twenty-two billion, two hundred twenty-one million, three thousand, three hundred twenty-one".