30023213021 has 4 divisors (see below), whose sum is σ = 30030346944. Its totient is φ = 30016079100.

The previous prime is 30023212991. The next prime is 30023213039. The reversal of 30023213021 is 12031232003.

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 30023213021 - 2¹⁰ = 30023211997 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 (30023213321) 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, 3560645 + ... + 3569066.

It is an arithmetic number, because the mean of its divisors is an integer number (7507586736).

Almost surely, 2^30023213021 is an apocalyptic number.

It is an amenable number.

30023213021 is a deficient number, since it is larger than the sum of its proper divisors (7133923).

30023213021 is an equidigital number, since it uses as much as digits as its factorization.

30023213021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7133922.

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

Adding to 30023213021 its reverse (12031232003), we get a palindrome (42054445024).

The spelling of 30023213021 in words is "thirty billion, twenty-three million, two hundred thirteen thousand, twenty-one".