30303131221 has 8 divisors (see below), whose sum is σ = 33331169088. Its totient is φ = 27548299900.

The previous prime is 30303131219. The next prime is 30303131233. The reversal of 30303131221 is 12213130303.

It is not a de Polignac number, because 30303131221 - 2¹ = 30303131219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30303138221) 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 in 7 ways as a sum of consecutive naturals, for example, 11382265 + ... + 11384926.

It is an arithmetic number, because the mean of its divisors is an integer number (4166396136).

Almost surely, 2^30303131221 is an apocalyptic number.

It is an amenable number.

30303131221 is a deficient number, since it is larger than the sum of its proper divisors (3028037867).

30303131221 is an equidigital number, since it uses as much as digits as its factorization.

30303131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22767224 (or 22767202 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 30303131221 its reverse (12213130303), we get a palindrome (42516261524).

The spelling of 30303131221 in words is "thirty billion, three hundred three million, one hundred thirty-one thousand, two hundred twenty-one".