312111213311 has 4 divisors (see below), whose sum is σ = 318751877472. Its totient is φ = 305470549152.

The previous prime is 312111213283. The next prime is 312111213353. The reversal of 312111213311 is 113312111213.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 312111213311 - 2⁶ = 312111213247 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 (312111213361) 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, 3320332010 + ... + 3320332103.

It is an arithmetic number, because the mean of its divisors is an integer number (79687969368).

Almost surely, 2^312111213311 is an apocalyptic number.

312111213311 is a deficient number, since it is larger than the sum of its proper divisors (6640664161).

312111213311 is an equidigital number, since it uses as much as digits as its factorization.

312111213311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6640664160.

The product of its digits is 108, while the sum is 20.

Adding to 312111213311 its reverse (113312111213), we get a palindrome (425423324524).

The spelling of 312111213311 in words is "three hundred twelve billion, one hundred eleven million, two hundred thirteen thousand, three hundred eleven".