303131130021 has 6 divisors (see below), whose sum is σ = 437856076710. Its totient is φ = 202087420008.

The previous prime is 303131130011. The next prime is 303131130041. The reversal of 303131130021 is 120031131303.

It is a happy number.

303131130021 is a `hidden beast` number, since 3 + 0 + 31 + 311 + 300 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 198617292225 + 104513837796 = 445665^2 + 323286^2 .

It is not a de Polignac number, because 303131130021 - 2¹⁰ = 303131128997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 303131129976 and 303131130003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (303131130011) 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 5 ways as a sum of consecutive naturals, for example, 16840618326 + ... + 16840618343.

It is an arithmetic number, because the mean of its divisors is an integer number (72976012785).

Almost surely, 2^303131130021 is an apocalyptic number.

It is an amenable number.

303131130021 is a deficient number, since it is larger than the sum of its proper divisors (134724946689).

303131130021 is a wasteful number, since it uses less digits than its factorization.

303131130021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33681236675 (or 33681236672 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 303131130021 its reverse (120031131303), we get a palindrome (423162261324).

The spelling of 303131130021 in words is "three hundred three billion, one hundred thirty-one million, one hundred thirty thousand, twenty-one".