30121103 has 4 divisors (see below), whose sum is σ = 30274200. Its totient is φ = 29968008.

The previous prime is 30121097. The next prime is 30121151. The reversal of 30121103 is 30112103.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30121103 - 2⁴ = 30121087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30121163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 76253 + ... + 76646.

It is an arithmetic number, because the mean of its divisors is an integer number (7568550).

Almost surely, 2^30121103 is an apocalyptic number.

30121103 is a deficient number, since it is larger than the sum of its proper divisors (153097).

30121103 is a wasteful number, since it uses less digits than its factorization.

30121103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153096.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 30121103 is about 5488.2695815712. The cubic root of 30121103 is about 311.1407950088.

Adding to 30121103 its reverse (30112103), we get a palindrome (60233206).

The spelling of 30121103 in words is "thirty million, one hundred twenty-one thousand, one hundred three".