311321100213 has 24 divisors (see below), whose sum is σ = 468342620928. Its totient is φ = 206656601184.

The previous prime is 311321100169. The next prime is 311321100217. The reversal of 311321100213 is 312001123113.

311321100213 is a `hidden beast` number, since 31 + 1 + 321 + 100 + 213 = 666.

It is not a de Polignac number, because 311321100213 - 2¹² = 311321096117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311321100217) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2692645 + ... + 2805882.

It is an arithmetic number, because the mean of its divisors is an integer number (19514275872).

Almost surely, 2^311321100213 is an apocalyptic number.

It is an amenable number.

311321100213 is a deficient number, since it is larger than the sum of its proper divisors (157021520715).

311321100213 is an equidigital number, since it uses as much as digits as its factorization.

311321100213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5498775 (or 5498763 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 311321100213 its reverse (312001123113), we get a palindrome (623322223326).

The spelling of 311321100213 in words is "three hundred eleven billion, three hundred twenty-one million, one hundred thousand, two hundred thirteen".