31012112 has 10 divisors (see below), whose sum is σ = 60085998. Its totient is φ = 15506048.

The previous prime is 31012099. The next prime is 31012117. The reversal of 31012112 is 21121013.

It can be written as a sum of positive squares in only one way, i.e., 30647296 + 364816 = 5536^2 + 604^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31012093 and 31012102.

It is not an unprimeable number, because it can be changed into a prime (31012117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 969113 + ... + 969144.

Almost surely, 2^31012112 is an apocalyptic number.

It is an amenable number.

31012112 is a deficient number, since it is larger than the sum of its proper divisors (29073886).

31012112 is a wasteful number, since it uses less digits than its factorization.

31012112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938265 (or 1938259 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 31012112 is about 5568.8519463171. The cubic root of 31012112 is about 314.1789721727.

Adding to 31012112 its reverse (21121013), we get a palindrome (52133125).

The spelling of 31012112 in words is "thirty-one million, twelve thousand, one hundred twelve".