30321203021 has 2 divisors, whose sum is σ = 30321203022. Its totient is φ = 30321203020.

The previous prime is 30321202999. The next prime is 30321203027. The reversal of 30321203021 is 12030212303.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29651118025 + 670084996 = 172195^2 + 25886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30321203021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30321203027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15160601510 + 15160601511.

It is an arithmetic number, because the mean of its divisors is an integer number (15160601511).

Almost surely, 2^30321203021 is an apocalyptic number.

It is an amenable number.

30321203021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30321203021 is an equidigital number, since it uses as much as digits as its factorization.

30321203021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30321203021 its reverse (12030212303), we get a palindrome (42351415324).

The spelling of 30321203021 in words is "thirty billion, three hundred twenty-one million, two hundred three thousand, twenty-one".