31102112 has 24 divisors (see below), whose sum is σ = 64835316. Its totient is φ = 14636032.

The previous prime is 31102087. The next prime is 31102121. The reversal of 31102112 is 21120113.

It can be written as a sum of positive squares in 2 ways, for example, as 25361296 + 5740816 = 5036^2 + 2396^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31102093 and 31102102.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 28043 + ... + 29130.

Almost surely, 2^31102112 is an apocalyptic number.

31102112 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31102112 is an abundant number, since it is smaller than the sum of its proper divisors (33733204).

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

31102112 is a wasteful number, since it uses less digits than its factorization.

31102112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57200 (or 57192 counting only the distinct ones).

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

The square root of 31102112 is about 5576.9267522534. The cubic root of 31102112 is about 314.4826040594.

Adding to 31102112 its reverse (21120113), we get a palindrome (52222225).

The spelling of 31102112 in words is "thirty-one million, one hundred two thousand, one hundred twelve".