311211112 has 32 divisors (see below), whose sum is σ = 618666120. Its totient is φ = 146257920.

The previous prime is 311211097. The next prime is 311211113. The reversal of 311211112 is 211112113.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 272448036 + 38763076 = 16506^2 + 6226^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311211092 and 311211101.

It is not an unprimeable number, because it can be changed into a prime (311211113) 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, 186988 + ... + 188644.

Almost surely, 2^311211112 is an apocalyptic number.

It is an amenable number.

311211112 is a deficient number, since it is larger than the sum of its proper divisors (307455008).

311211112 is a wasteful number, since it uses less digits than its factorization.

311211112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3061 (or 3057 counting only the distinct ones).

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

The square root of 311211112 is about 17641.1766047506. The cubic root of 311211112 is about 677.6701638177.

Adding to 311211112 its reverse (211112113), we get a palindrome (522323225).

The spelling of 311211112 in words is "three hundred eleven million, two hundred eleven thousand, one hundred twelve".