30313333021 has 4 divisors (see below), whose sum is σ = 30330279100. Its totient is φ = 30296386944.

The previous prime is 30313333009. The next prime is 30313333031. The reversal of 30313333021 is 12033331303.

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 27812232900 + 2501100121 = 166770^2 + 50011^2 .

It is a cyclic number.

It is not a de Polignac number, because 30313333021 - 2¹⁹ = 30312808733 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30313332983 and 30313333001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30313333031) 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, 8470356 + ... + 8473933.

It is an arithmetic number, because the mean of its divisors is an integer number (7582569775).

Almost surely, 2^30313333021 is an apocalyptic number.

It is an amenable number.

30313333021 is a deficient number, since it is larger than the sum of its proper divisors (16946079).

30313333021 is a wasteful number, since it uses less digits than its factorization.

30313333021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16946078.

The product of its (nonzero) digits is 1458, while the sum is 22.

Adding to 30313333021 its reverse (12033331303), we get a palindrome (42346664324).

The spelling of 30313333021 in words is "thirty billion, three hundred thirteen million, three hundred thirty-three thousand, twenty-one".