30021320221 has 8 divisors (see below), whose sum is σ = 32646396600. Its totient is φ = 27491701248.

The previous prime is 30021320213. The next prime is 30021320261. The reversal of 30021320221 is 12202312003.

It can be written as a sum of positive squares in 4 ways, for example, as 15810296121 + 14211024100 = 125739^2 + 119210^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30021320221 - 2³ = 30021320213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30021320195 and 30021320204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30021320261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23863696 + ... + 23864953.

It is an arithmetic number, because the mean of its divisors is an integer number (4080799575).

Almost surely, 2^30021320221 is an apocalyptic number.

It is an amenable number.

30021320221 is a deficient number, since it is larger than the sum of its proper divisors (2625076379).

30021320221 is a wasteful number, since it uses less digits than its factorization.

30021320221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47728703.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30021320221 its reverse (12202312003), we get a palindrome (42223632224).

The spelling of 30021320221 in words is "thirty billion, twenty-one million, three hundred twenty thousand, two hundred twenty-one".