30200021 has 2 divisors, whose sum is σ = 30200022. Its totient is φ = 30200020.

The previous prime is 30200011. The next prime is 30200033. The reversal of 30200021 is 12000203.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20151121 + 10048900 = 4489^2 + 3170^2 .

It is a cyclic number.

It is not a de Polignac number, because 30200021 - 2⁶ = 30199957 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30199981 and 30200008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30200011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15100010 + 15100011.

It is an arithmetic number, because the mean of its divisors is an integer number (15100011).

Almost surely, 2^30200021 is an apocalyptic number.

It is an amenable number.

30200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30200021 is an equidigital number, since it uses as much as digits as its factorization.

30200021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 8.

The square root of 30200021 is about 5495.4545762839. The cubic root of 30200021 is about 311.4122901116.

Adding to 30200021 its reverse (12000203), we get a palindrome (42200224).

The spelling of 30200021 in words is "thirty million, two hundred thousand, twenty-one".