30320231021 has 4 divisors (see below), whose sum is σ = 30345478044. Its totient is φ = 30294984000.

The previous prime is 30320230991. The next prime is 30320231041. The reversal of 30320231021 is 12013202303.

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 13818002500 + 16502228521 = 117550^2 + 128461^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30320231021 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 (30320231041) 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 3 ways as a sum of consecutive naturals, for example, 12621710 + ... + 12624111.

It is an arithmetic number, because the mean of its divisors is an integer number (7586369511).

Almost surely, 2^30320231021 is an apocalyptic number.

It is an amenable number.

30320231021 is a deficient number, since it is larger than the sum of its proper divisors (25247023).

30320231021 is a wasteful number, since it uses less digits than its factorization.

30320231021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25247022.

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

Adding to 30320231021 its reverse (12013202303), we get a palindrome (42333433324).

The spelling of 30320231021 in words is "thirty billion, three hundred twenty million, two hundred thirty-one thousand, twenty-one".