21323313303243 has 16 divisors (see below), whose sum is σ = 32655947635200. Its totient is φ = 12123520554816.

The previous prime is 21323313303239. The next prime is 21323313303263. The reversal of 21323313303243 is 34230331332312.

It is not a de Polignac number, because 21323313303243 - 2² = 21323313303239 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21323313303263) 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 15 ways as a sum of consecutive naturals, for example, 2551241730 + ... + 2551250087.

It is an arithmetic number, because the mean of its divisors is an integer number (2040996727200).

Almost surely, 2^{21323313303243} is an apocalyptic number.

21323313303243 is a deficient number, since it is larger than the sum of its proper divisors (11332634331957).

21323313303243 is a wasteful number, since it uses less digits than its factorization.

21323313303243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5102492026.

The product of its (nonzero) digits is 69984, while the sum is 33.

Adding to 21323313303243 its reverse (34230331332312), we get a palindrome (55553644635555).

The spelling of 21323313303243 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirteen million, three hundred three thousand, two hundred forty-three".