30203002021 has 2 divisors, whose sum is σ = 30203002022. Its totient is φ = 30203002020.

The previous prime is 30203001971. The next prime is 30203002073. The reversal of 30203002021 is 12020030203.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24515730625 + 5687271396 = 156575^2 + 75414^2 .

It is a cyclic number.

It is not a de Polignac number, because 30203002021 - 2⁷ = 30203001893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30203001992 and 30203002010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30203000021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15101501010 + 15101501011.

It is an arithmetic number, because the mean of its divisors is an integer number (15101501011).

Almost surely, 2^30203002021 is an apocalyptic number.

It is an amenable number.

30203002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30203002021 is an equidigital number, since it uses as much as digits as its factorization.

30203002021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 13.

Adding to 30203002021 its reverse (12020030203), we get a palindrome (42223032224).

The spelling of 30203002021 in words is "thirty billion, two hundred three million, two thousand, twenty-one".