30120112 has 40 divisors (see below), whose sum is σ = 64884240. Its totient is φ = 13428480.

The previous prime is 30120061. The next prime is 30120113. The reversal of 30120112 is 21102103.

It is a super-2 number, since 2×30120112² = 1814442293785088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30120113) 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, 7714 + ... + 10942.

It is an arithmetic number, because the mean of its divisors is an integer number (1622106).

Almost surely, 2^30120112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30120112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32442120).

30120112 is an abundant number, since it is smaller than the sum of its proper divisors (34764128).

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

30120112 is a wasteful number, since it uses less digits than its factorization.

30120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3301 (or 3295 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 30120112 is about 5488.1792973627. The cubic root of 30120112 is about 311.1373827399.

Adding to 30120112 its reverse (21102103), we get a palindrome (51222215).

Subtracting from 30120112 its reverse (21102103), we obtain a square (9018009 = 3003²).

The spelling of 30120112 in words is "thirty million, one hundred twenty thousand, one hundred twelve".