30511204221 has 4 divisors (see below), whose sum is σ = 40681605632. Its totient is φ = 20340802812.

The previous prime is 30511204159. The next prime is 30511204237. The reversal of 30511204221 is 12240211503.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30511204221 - 2¹¹ = 30511202173 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 (30511204271) 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 in 3 ways as a sum of consecutive naturals, for example, 5085200701 + ... + 5085200706.

It is an arithmetic number, because the mean of its divisors is an integer number (10170401408).

Almost surely, 2^30511204221 is an apocalyptic number.

It is an amenable number.

30511204221 is a deficient number, since it is larger than the sum of its proper divisors (10170401411).

30511204221 is a wasteful number, since it uses less digits than its factorization.

30511204221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10170401410.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 30511204221 its reverse (12240211503), we get a palindrome (42751415724).

The spelling of 30511204221 in words is "thirty billion, five hundred eleven million, two hundred four thousand, two hundred twenty-one".