312111112 has 16 divisors (see below), whose sum is σ = 585573840. Its totient is φ = 155958096.

The previous prime is 312111103. The next prime is 312111139. The reversal of 312111112 is 211111213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 312111092 and 312111101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2463 + ... + 25105.

It is an arithmetic number, because the mean of its divisors is an integer number (36598365).

Almost surely, 2^312111112 is an apocalyptic number.

It is an amenable number.

312111112 is a deficient number, since it is larger than the sum of its proper divisors (273462728).

312111112 is a wasteful number, since it uses less digits than its factorization.

312111112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24372 (or 24368 counting only the distinct ones).

The product of its digits is 12, while the sum is 13.

The square root of 312111112 is about 17666.6666918239. Note that the first 4 decimals coincide. The cubic root of 312111112 is about 678.3227927833.

Adding to 312111112 its reverse (211111213), we get a palindrome (523222325).

It can be divided in two parts, 31211 and 1112, that added together give a palindrome (32323).

The spelling of 312111112 in words is "three hundred twelve million, one hundred eleven thousand, one hundred twelve".