30421321 has 4 divisors (see below), whose sum is σ = 34767232. Its totient is φ = 26075412.

The previous prime is 30421291. The next prime is 30421333. The reversal of 30421321 is 12312403.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12312403 = 17 ⋅724259.

It is a cyclic number.

It is not a de Polignac number, because 30421321 - 2⁹ = 30420809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30421295 and 30421304.

It is not an unprimeable number, because it can be changed into a prime (30421021) 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, 2172945 + ... + 2172958.

It is an arithmetic number, because the mean of its divisors is an integer number (8691808).

Almost surely, 2^30421321 is an apocalyptic number.

It is an amenable number.

30421321 is a deficient number, since it is larger than the sum of its proper divisors (4345911).

30421321 is an equidigital number, since it uses as much as digits as its factorization.

30421321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4345910.

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 30421321 is about 5515.5526468342. The cubic root of 30421321 is about 312.1710962997.

Adding to 30421321 its reverse (12312403), we get a palindrome (42733724).

The spelling of 30421321 in words is "thirty million, four hundred twenty-one thousand, three hundred twenty-one".