30231434021 has 4 divisors (see below), whose sum is σ = 30232262892. Its totient is φ = 30230605152.

The previous prime is 30231433993. The next prime is 30231434041. The reversal of 30231434021 is 12043413203.

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 5962156225 + 24269277796 = 77215^2 + 155786^2 .

It is a cyclic number.

It is not a de Polignac number, because 30231434021 - 2¹⁰ = 30231432997 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 (30231434041) 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, 357080 + ... + 433553.

It is an arithmetic number, because the mean of its divisors is an integer number (7558065723).

Almost surely, 2^30231434021 is an apocalyptic number.

It is an amenable number.

30231434021 is a deficient number, since it is larger than the sum of its proper divisors (828871).

30231434021 is an equidigital number, since it uses as much as digits as its factorization.

30231434021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828870.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 30231434021 its reverse (12043413203), we get a palindrome (42274847224).

The spelling of 30231434021 in words is "thirty billion, two hundred thirty-one million, four hundred thirty-four thousand, twenty-one".