30311020321 has 4 divisors (see below), whose sum is σ = 31906337200. Its totient is φ = 28715703444.

The previous prime is 30311020291. The next prime is 30311020331. The reversal of 30311020321 is 12302011303.

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 a cyclic number.

It is not a de Polignac number, because 30311020321 - 2¹⁹ = 30310496033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30311020295 and 30311020304.

It is not an unprimeable number, because it can be changed into a prime (30311020331) 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, 797658411 + ... + 797658448.

It is an arithmetic number, because the mean of its divisors is an integer number (7976584300).

Almost surely, 2^30311020321 is an apocalyptic number.

It is an amenable number.

30311020321 is a deficient number, since it is larger than the sum of its proper divisors (1595316879).

30311020321 is a wasteful number, since it uses less digits than its factorization.

30311020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1595316878.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 30311020321 its reverse (12302011303), we get a palindrome (42613031624).

The spelling of 30311020321 in words is "thirty billion, three hundred eleven million, twenty thousand, three hundred twenty-one".