30021430021 has 4 divisors (see below), whose sum is σ = 32750650944. Its totient is φ = 27292209100.

The previous prime is 30021429989. The next prime is 30021430027. The reversal of 30021430021 is 12003412003.

It is a happy number.

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 30021430021 - 2⁵ = 30021429989 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30021429977 and 30021430004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30021430027) 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, 1364610445 + ... + 1364610466.

It is an arithmetic number, because the mean of its divisors is an integer number (8187662736).

Almost surely, 2^30021430021 is an apocalyptic number.

It is an amenable number.

30021430021 is a deficient number, since it is larger than the sum of its proper divisors (2729220923).

30021430021 is a wasteful number, since it uses less digits than its factorization.

30021430021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2729220922.

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 30021430021 its reverse (12003412003), we get a palindrome (42024842024).

The spelling of 30021430021 in words is "thirty billion, twenty-one million, four hundred thirty thousand, twenty-one".