3111111312 has 20 divisors (see below), whose sum is σ = 8037037680. Its totient is φ = 1037037088.

The previous prime is 3111111287. The next prime is 3111111317. The reversal of 3111111312 is 2131111113.

It is a super-2 number, since 2×3111111312² = 19358027191308722688, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 3111111291 and 3111111300.

It is not an unprimeable number, because it can be changed into a prime (3111111317) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32407362 + ... + 32407457.

It is an arithmetic number, because the mean of its divisors is an integer number (401851884).

Almost surely, 2^3111111312 is an apocalyptic number.

It is an amenable number.

3111111312 is an abundant number, since it is smaller than the sum of its proper divisors (4925926368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3111111312 is a wasteful number, since it uses less digits than its factorization.

3111111312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64814830 (or 64814824 counting only the distinct ones).

The product of its digits is 18, while the sum is 15.

The square root of 3111111312 is about 55777.3369030828. The cubic root of 3111111312 is about 1459.8397447173.

Adding to 3111111312 its reverse (2131111113), we get a palindrome (5242222425).

The spelling of 3111111312 in words is "three billion, one hundred eleven million, one hundred eleven thousand, three hundred twelve".