30421404221 has 8 divisors (see below), whose sum is σ = 32955369720. Its totient is φ = 28081294176.

The previous prime is 30421404187. The next prime is 30421404257. The reversal of 30421404221 is 12240412403.

It can be written as a sum of positive squares in 4 ways, for example, as 17170171225 + 13251232996 = 131035^2 + 115114^2 .

It is not a de Polignac number, because 30421404221 - 2³⁴ = 13241535037 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30421406221) 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, 6921200 + ... + 6925593.

It is an arithmetic number, because the mean of its divisors is an integer number (4119421215).

Almost surely, 2^30421404221 is an apocalyptic number.

It is an amenable number.

30421404221 is a deficient number, since it is larger than the sum of its proper divisors (2533965499).

30421404221 is an equidigital number, since it uses as much as digits as its factorization.

30421404221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13846832 (or 13846806 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 30421404221 its reverse (12240412403), we get a palindrome (42661816624).

The spelling of 30421404221 in words is "thirty billion, four hundred twenty-one million, four hundred four thousand, two hundred twenty-one".