30302021 has 4 divisors (see below), whose sum is σ = 30314112. Its totient is φ = 30289932.

The previous prime is 30302011. The next prime is 30302033. The reversal of 30302021 is 12020303.

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 a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12020303 = 139 ⋅86477.

It is a cyclic number.

It is not a de Polignac number, because 30302021 - 2¹⁰ = 30300997 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30301993 and 30302011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30302011) 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, 725 + ... + 7818.

It is an arithmetic number, because the mean of its divisors is an integer number (7578528).

Almost surely, 2^30302021 is an apocalyptic number.

It is an amenable number.

30302021 is a deficient number, since it is larger than the sum of its proper divisors (12091).

30302021 is an equidigital number, since it uses as much as digits as its factorization.

30302021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12090.

The product of its (nonzero) digits is 36, while the sum is 11.

The square root of 30302021 is about 5504.7271503681. The cubic root of 30302021 is about 311.7624925139.

Adding to 30302021 its reverse (12020303), we get a palindrome (42322324).

The spelling of 30302021 in words is "thirty million, three hundred two thousand, twenty-one".