304304431013021 has 4 divisors (see below), whose sum is σ = 312528875094492. Its totient is φ = 296079986931552.

The previous prime is 304304431012979. The next prime is 304304431013117. The reversal of 304304431013021 is 120310134403403.

It is a happy number.

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 224546778463225 + 79757652549796 = 14984885^2 + 8930714^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-304304431013021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (304304431013321) 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 3 ways as a sum of consecutive naturals, for example, 4112222040680 + ... + 4112222040753.

It is an arithmetic number, because the mean of its divisors is an integer number (78132218773623).

Almost surely, 2^{304304431013021} is an apocalyptic number.

It is an amenable number.

304304431013021 is a deficient number, since it is larger than the sum of its proper divisors (8224444081471).

304304431013021 is an equidigital number, since it uses as much as digits as its factorization.

304304431013021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8224444081470.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 304304431013021 its reverse (120310134403403), we get a palindrome (424614565416424).

The spelling of 304304431013021 in words is "three hundred four trillion, three hundred four billion, four hundred thirty-one million, thirteen thousand, twenty-one".