30312233021 has 8 divisors (see below), whose sum is σ = 34816636800. Its totient is φ = 25851350448.

The previous prime is 30312233009. The next prime is 30312233059. The reversal of 30312233021 is 12033221303.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-30312233021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30312232984 and 30312233002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30312233321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10878806 + ... + 10881591.

It is an arithmetic number, because the mean of its divisors is an integer number (4352079600).

Almost surely, 2^30312233021 is an apocalyptic number.

It is an amenable number.

30312233021 is a deficient number, since it is larger than the sum of its proper divisors (4504403779).

30312233021 is a wasteful number, since it uses less digits than its factorization.

30312233021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21760603.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 30312233021 its reverse (12033221303), we get a palindrome (42345454324).

The spelling of 30312233021 in words is "thirty billion, three hundred twelve million, two hundred thirty-three thousand, twenty-one".