21323311300321 has 4 divisors (see below), whose sum is σ = 21324148486144. Its totient is φ = 21322474114500.

The previous prime is 21323311300111. The next prime is 21323311300351. The reversal of 21323311300321 is 12300311332312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21323311300321 - 2²¹ = 21323309203169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323311300351) 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 3 ways as a sum of consecutive naturals, for example, 418554705 + ... + 418605646.

It is an arithmetic number, because the mean of its divisors is an integer number (5331037121536).

Almost surely, 2^{21323311300321} is an apocalyptic number.

It is an amenable number.

21323311300321 is a deficient number, since it is larger than the sum of its proper divisors (837185823).

21323311300321 is an equidigital number, since it uses as much as digits as its factorization.

21323311300321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837185822.

The product of its (nonzero) digits is 1944, while the sum is 25.

Adding to 21323311300321 its reverse (12300311332312), we get a palindrome (33623622632633).

The spelling of 21323311300321 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred eleven million, three hundred thousand, three hundred twenty-one".