312112111 has 4 divisors (see below), whose sum is σ = 313407424. Its totient is φ = 310816800.

The previous prime is 312112109. The next prime is 312112159. The reversal of 312112111 is 111211213.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 111211213 = 397 ⋅280129.

It is a cyclic number.

It is not a de Polignac number, because 312112111 - 2¹ = 312112109 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 312112091 and 312112100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312112511) 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, 647295 + ... + 647776.

It is an arithmetic number, because the mean of its divisors is an integer number (78351856).

Almost surely, 2^312112111 is an apocalyptic number.

312112111 is a deficient number, since it is larger than the sum of its proper divisors (1295313).

312112111 is a wasteful number, since it uses less digits than its factorization.

312112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1295312.

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

The square root of 312112111 is about 17666.6949653861. The cubic root of 312112111 is about 678.3235165039.

Adding to 312112111 its reverse (111211213), we get a palindrome (423323324).

The spelling of 312112111 in words is "three hundred twelve million, one hundred twelve thousand, one hundred eleven".