30421121 has 4 divisors (see below), whose sum is σ = 30434352. Its totient is φ = 30407892.

The previous prime is 30421117. The next prime is 30421129. The reversal of 30421121 is 12112403.

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 30421121 - 2² = 30421117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30421096 and 30421105.

It is not an unprimeable number, because it can be changed into a prime (30421129) 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, 2171 + ... + 8096.

It is an arithmetic number, because the mean of its divisors is an integer number (7608588).

Almost surely, 2^30421121 is an apocalyptic number.

It is an amenable number.

30421121 is a deficient number, since it is larger than the sum of its proper divisors (13231).

30421121 is a wasteful number, since it uses less digits than its factorization.

30421121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13230.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 30421121 is about 5515.5345162550. The cubic root of 30421121 is about 312.1704121922.

Adding to 30421121 its reverse (12112403), we get a palindrome (42533524).

The spelling of 30421121 in words is "thirty million, four hundred twenty-one thousand, one hundred twenty-one".