21302113331 has 2 divisors, whose sum is σ = 21302113332. Its totient is φ = 21302113330.

The previous prime is 21302113309. The next prime is 21302113337. The reversal of 21302113331 is 13331120312.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21302113331 - 2¹⁸ = 21301851187 is a prime.

It is a super-2 number, since 2×21302113331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21302113337) 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, 10651056665 + 10651056666.

It is an arithmetic number, because the mean of its divisors is an integer number (10651056666).

Almost surely, 2^21302113331 is an apocalyptic number.

21302113331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21302113331 is an equidigital number, since it uses as much as digits as its factorization.

21302113331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 21302113331 its reverse (13331120312), we get a palindrome (34633233643).

The spelling of 21302113331 in words is "twenty-one billion, three hundred two million, one hundred thirteen thousand, three hundred thirty-one".