30121512 has 16 divisors (see below), whose sum is σ = 75303840. Its totient is φ = 10040496.

The previous prime is 30121499. The next prime is 30121523. The reversal of 30121512 is 21512103.

It is a super-2 number, since 2×30121512² = 1814610970332288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 30121491 and 30121500.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 627508 + ... + 627555.

It is an arithmetic number, because the mean of its divisors is an integer number (4706490).

Almost surely, 2^30121512 is an apocalyptic number.

It is an amenable number.

30121512 is an abundant number, since it is smaller than the sum of its proper divisors (45182328).

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

30121512 is a wasteful number, since it uses less digits than its factorization.

30121512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255072 (or 1255068 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 30121512 is about 5488.3068427339. The cubic root of 30121512 is about 311.1422032796.

Adding to 30121512 its reverse (21512103), we get a palindrome (51633615).

The spelling of 30121512 in words is "thirty million, one hundred twenty-one thousand, five hundred twelve".