21023323303231 has 2 divisors, whose sum is σ = 21023323303232. Its totient is φ = 21023323303230.

The previous prime is 21023323303219. The next prime is 21023323303289. The reversal of 21023323303231 is 13230332332012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21023323303231 - 2³⁹ = 20473567489343 is a prime.

It is a super-2 number, since 2×21023323303231² (a number of 27 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 21023323303231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023323373231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511661651615 + 10511661651616.

It is an arithmetic number, because the mean of its divisors is an integer number (10511661651616).

Almost surely, 2^{21023323303231} is an apocalyptic number.

21023323303231 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023323303231 is an equidigital number, since it uses as much as digits as its factorization.

21023323303231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 21023323303231 its reverse (13230332332012), we get a palindrome (34253655635243).

The spelling of 21023323303231 in words is "twenty-one trillion, twenty-three billion, three hundred twenty-three million, three hundred three thousand, two hundred thirty-one".