30420121 has 4 divisors (see below), whose sum is σ = 32021200. Its totient is φ = 28819044.

The previous prime is 30420119. The next prime is 30420161. The reversal of 30420121 is 12102403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30420121 - 2¹ = 30420119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30420161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 800511 + ... + 800548.

It is an arithmetic number, because the mean of its divisors is an integer number (8005300).

Almost surely, 2^30420121 is an apocalyptic number.

It is an amenable number.

30420121 is a deficient number, since it is larger than the sum of its proper divisors (1601079).

30420121 is a wasteful number, since it uses less digits than its factorization.

30420121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1601078.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 30420121 is about 5515.4438624647. The cubic root of 30420121 is about 312.1669916100.

Adding to 30420121 its reverse (12102403), we get a palindrome (42522524).

The spelling of 30420121 in words is "thirty million, four hundred twenty thousand, one hundred twenty-one".