30105012 has 36 divisors (see below), whose sum is σ = 81715200. Its totient is φ = 8601264.

The previous prime is 30104989. The next prime is 30105059. The reversal of 30105012 is 21050103.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25012 + ... + 26187.

Almost surely, 2^30105012 is an apocalyptic number.

It is an amenable number.

30105012 is an abundant number, since it is smaller than the sum of its proper divisors (51610188).

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

30105012 is a wasteful number, since it uses less digits than its factorization.

30105012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51220 (or 51211 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 30105012 is about 5486.8034409846. The cubic root of 30105012 is about 311.0853802794.

Adding to 30105012 its reverse (21050103), we get a palindrome (51155115).

The spelling of 30105012 in words is "thirty million, one hundred five thousand, twelve".