312111021311 has 8 divisors (see below), whose sum is σ = 312368941248. Its totient is φ = 311853168000.

The previous prime is 312111021293. The next prime is 312111021329. The reversal of 312111021311 is 113120111213.

It is an interprime number because it is at equal distance from previous prime (312111021293) and next prime (312111021329).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-312111021311 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 312111021311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312111021811) 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, 13896851 + ... + 13919291.

It is an arithmetic number, because the mean of its divisors is an integer number (39046117656).

Almost surely, 2^312111021311 is an apocalyptic number.

312111021311 is a deficient number, since it is larger than the sum of its proper divisors (257919937).

312111021311 is a wasteful number, since it uses less digits than its factorization.

312111021311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33313.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 312111021311 its reverse (113120111213), we get a palindrome (425231132524).

The spelling of 312111021311 in words is "three hundred twelve billion, one hundred eleven million, twenty-one thousand, three hundred eleven".