311111303213 has 4 divisors (see below), whose sum is σ = 311352289248. Its totient is φ = 310870317180.

The previous prime is 311111303207. The next prime is 311111303287. The reversal of 311111303213 is 312303111113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311111303213 - 2¹⁰ = 311111302189 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 (311113303213) 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, 120491081 + ... + 120493662.

It is an arithmetic number, because the mean of its divisors is an integer number (77838072312).

Almost surely, 2^311111303213 is an apocalyptic number.

It is an amenable number.

311111303213 is a deficient number, since it is larger than the sum of its proper divisors (240986035).

311111303213 is a wasteful number, since it uses less digits than its factorization.

311111303213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240986034.

The product of its (nonzero) digits is 162, while the sum is 20.

Adding to 311111303213 its reverse (312303111113), we get a palindrome (623414414326).

The spelling of 311111303213 in words is "three hundred eleven billion, one hundred eleven million, three hundred three thousand, two hundred thirteen".