21303282331 has 2 divisors, whose sum is σ = 21303282332. Its totient is φ = 21303282330.

The previous prime is 21303282317. The next prime is 21303282359. The reversal of 21303282331 is 13328230312.

It is an a-pointer prime, because the next prime (21303282359) can be obtained adding 21303282331 to its sum of digits (28).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21303282331 - 2⁹ = 21303281819 is a prime.

It is a super-2 number, since 2×21303282331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21303282331.

It is not a weakly prime, because it can be changed into another prime (21303282031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10651641165 + 10651641166.

It is an arithmetic number, because the mean of its divisors is an integer number (10651641166).

Almost surely, 2^21303282331 is an apocalyptic number.

21303282331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21303282331 is an equidigital number, since it uses as much as digits as its factorization.

21303282331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 28.

The spelling of 21303282331 in words is "twenty-one billion, three hundred three million, two hundred eighty-two thousand, three hundred thirty-one".