30121225 has 24 divisors (see below), whose sum is σ = 38568960. Its totient is φ = 23325120.

The previous prime is 30121207. The next prime is 30121241. The reversal of 30121225 is 52212103.

It is not a de Polignac number, because 30121225 - 2⁷ = 30121097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30121199 and 30121208.

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 23 ways as a sum of consecutive naturals, for example, 168186 + ... + 168364.

It is an arithmetic number, because the mean of its divisors is an integer number (1607040).

Almost surely, 2^30121225 is an apocalyptic number.

It is an amenable number.

30121225 is a deficient number, since it is larger than the sum of its proper divisors (8447735).

30121225 is a wasteful number, since it uses less digits than its factorization.

30121225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 369 (or 364 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 30121225 is about 5488.2806961743. The cubic root of 30121225 is about 311.1412150811.

Adding to 30121225 its reverse (52212103), we get a palindrome (82333328).

The spelling of 30121225 in words is "thirty million, one hundred twenty-one thousand, two hundred twenty-five".