12300031021 has 4 divisors (see below), whose sum is σ = 12532107132. Its totient is φ = 12067954912.

The previous prime is 12300030997. The next prime is 12300031039. The reversal of 12300031021 is 12013000321.

12300031021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12013000321 = 7 ⋅1716142903.

It can be written as a sum of positive squares in 2 ways, for example, as 6248902500 + 6051128521 = 79050^2 + 77789^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12300031021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12300030992 and 12300031010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12300031061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116037976 + ... + 116038081.

It is an arithmetic number, because the mean of its divisors is an integer number (3133026783).

Almost surely, 2^12300031021 is an apocalyptic number.

It is an amenable number.

12300031021 is a deficient number, since it is larger than the sum of its proper divisors (232076111).

12300031021 is an equidigital number, since it uses as much as digits as its factorization.

12300031021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232076110.

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 12300031021 its reverse (12013000321), we get a palindrome (24313031342).

The spelling of 12300031021 in words is "twelve billion, three hundred million, thirty-one thousand, twenty-one".