311322001213 has 4 divisors (see below), whose sum is σ = 311327345628. Its totient is φ = 311316656800.

The previous prime is 311322001201. The next prime is 311322001223. The reversal of 311322001213 is 312100223113.

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 5050518489 + 306271482724 = 71067^2 + 553418^2 .

It is a cyclic number.

It is not a de Polignac number, because 311322001213 - 2³³ = 302732066621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311322001223) 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, 2583856 + ... + 2701657.

It is an arithmetic number, because the mean of its divisors is an integer number (77831836407).

Almost surely, 2^311322001213 is an apocalyptic number.

It is an amenable number.

311322001213 is a deficient number, since it is larger than the sum of its proper divisors (5344415).

311322001213 is an equidigital number, since it uses as much as digits as its factorization.

311322001213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5344414.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 311322001213 its reverse (312100223113), we get a palindrome (623422224326).

The spelling of 311322001213 in words is "three hundred eleven billion, three hundred twenty-two million, one thousand, two hundred thirteen".