30112212 has 72 divisors (see below), whose sum is σ = 78599136. Its totient is φ = 8914752.

The previous prime is 30112183. The next prime is 30112213. The reversal of 30112212 is 21221103.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30112213) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 449403 + ... + 449469.

Almost surely, 2^30112212 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 30112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39299568).

30112212 is an abundant number, since it is smaller than the sum of its proper divisors (48486924).

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

30112212 is a wasteful number, since it uses less digits than its factorization.

30112212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 128 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 30112212 is about 5487.4595214908. The cubic root of 30112212 is about 311.1101783230.

Adding to 30112212 its reverse (21221103), we get a palindrome (51333315).

The spelling of 30112212 in words is "thirty million, one hundred twelve thousand, two hundred twelve".