311221333313213 has 8 divisors (see below), whose sum is σ = 311386928563200. Its totient is φ = 311055761813328.

The previous prime is 311221333313153. The next prime is 311221333313377. The reversal of 311221333313213 is 312313333122113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311221333313213 - 2⁸ = 311221333312957 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 311221333313213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311221303313213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20308295 + ... + 32169387.

It is an arithmetic number, because the mean of its divisors is an integer number (38923366070400).

Almost surely, 2^{311221333313213} is an apocalyptic number.

It is an amenable number.

311221333313213 is a deficient number, since it is larger than the sum of its proper divisors (165595249987).

311221333313213 is a wasteful number, since it uses less digits than its factorization.

311221333313213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11875051.

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

Adding to 311221333313213 its reverse (312313333122113), we get a palindrome (623534666435326).

The spelling of 311221333313213 in words is "three hundred eleven trillion, two hundred twenty-one billion, three hundred thirty-three million, three hundred thirteen thousand, two hundred thirteen".