30121219 has 8 divisors (see below), whose sum is σ = 31595328. Its totient is φ = 28681920.

The previous prime is 30121207. The next prime is 30121241. The reversal of 30121219 is 91212103.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30121219 - 2⁹ = 30120707 is a prime.

It is a super-2 number, since 2×30121219² = 1814575668091922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30121196 and 30121205.

It is not an unprimeable number, because it can be changed into a prime (30121319) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6922 + ... + 10399.

It is an arithmetic number, because the mean of its divisors is an integer number (3949416).

Almost surely, 2^30121219 is an apocalyptic number.

30121219 is a deficient number, since it is larger than the sum of its proper divisors (1474109).

30121219 is a wasteful number, since it uses less digits than its factorization.

30121219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17405.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 30121219 is about 5488.2801495550. The cubic root of 30121219 is about 311.1411944218.

The spelling of 30121219 in words is "thirty million, one hundred twenty-one thousand, two hundred nineteen".