30321002021 has 2 divisors, whose sum is σ = 30321002022. Its totient is φ = 30321002020.

The previous prime is 30321002011. The next prime is 30321002059. The reversal of 30321002021 is 12020012303.

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., 22812779521 + 7508222500 = 151039^2 + 86650^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30321002021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30321001987 and 30321002005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30321002011) 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, 15160501010 + 15160501011.

It is an arithmetic number, because the mean of its divisors is an integer number (15160501011).

Almost surely, 2^30321002021 is an apocalyptic number.

It is an amenable number.

30321002021 is a deficient number, since it is larger than the sum of its proper divisors (1).

30321002021 is an equidigital number, since it uses as much as digits as its factorization.

30321002021 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 14.

Adding to 30321002021 its reverse (12020012303), we get a palindrome (42341014324).

The spelling of 30321002021 in words is "thirty billion, three hundred twenty-one million, two thousand, twenty-one".