30321021 has 8 divisors (see below), whose sum is σ = 40670784. Its totient is φ = 20092640.

The previous prime is 30321001. The next prime is 30321023. The reversal of 30321021 is 12012303.

It is a happy number.

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 30321021 - 2¹³ = 30312829 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30320988 and 30321006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30321023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29760 + ... + 30761.

It is an arithmetic number, because the mean of its divisors is an integer number (5083848).

Almost surely, 2^30321021 is an apocalyptic number.

It is an amenable number.

30321021 is a deficient number, since it is larger than the sum of its proper divisors (10349763).

30321021 is a wasteful number, since it uses less digits than its factorization.

30321021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60691.

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 30321021 is about 5506.4526693689. The cubic root of 30321021 is about 311.8276394309.

Adding to 30321021 its reverse (12012303), we get a palindrome (42333324).

The spelling of 30321021 in words is "thirty million, three hundred twenty-one thousand, twenty-one".