30231020321 has 4 divisors (see below), whose sum is σ = 32009315652. Its totient is φ = 28452724992.

The previous prime is 30231020299. The next prime is 30231020359. The reversal of 30231020321 is 12302013203.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23050830625 + 7180189696 = 151825^2 + 84736^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231020321 - 2¹⁴ = 30231003937 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17), and also a Moran number because the ratio is a prime number: 1778295313 = 30231020321 / (3 + 0 + 2 + 3 + 1 + 0 + 2 + 0 + 3 + 2 + 1).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30231020321.

It is not an unprimeable number, because it can be changed into a prime (30231020381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 889147640 + ... + 889147673.

It is an arithmetic number, because the mean of its divisors is an integer number (8002328913).

Almost surely, 2^30231020321 is an apocalyptic number.

It is an amenable number.

30231020321 is a deficient number, since it is larger than the sum of its proper divisors (1778295331).

30231020321 is a wasteful number, since it uses less digits than its factorization.

30231020321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778295330.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 30231020321 its reverse (12302013203), we get a palindrome (42533033524).

The spelling of 30231020321 in words is "thirty billion, two hundred thirty-one million, twenty thousand, three hundred twenty-one".