30230021 has 2 divisors, whose sum is σ = 30230022. Its totient is φ = 30230020.

The previous prime is 30230017. The next prime is 30230023. The reversal of 30230021 is 12003203.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29008996 + 1221025 = 5386^2 + 1105^2 .

It is a cyclic number.

It is not a de Polignac number, because 30230021 - 2² = 30230017 is a prime.

Together with 30230023, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 30229984 and 30230011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30230023) 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 as a sum of consecutive naturals, namely, 15115010 + 15115011.

It is an arithmetic number, because the mean of its divisors is an integer number (15115011).

Almost surely, 2^30230021 is an apocalyptic number.

It is an amenable number.

30230021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30230021 is an equidigital number, since it uses as much as digits as its factorization.

30230021 is an odious number, because the sum of its binary digits is odd.

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

The square root of 30230021 is about 5498.1834272785. The cubic root of 30230021 is about 311.5153725665.

Adding to 30230021 its reverse (12003203), we get a palindrome (42233224).

The spelling of 30230021 in words is "thirty million, two hundred thirty thousand, twenty-one".