21233123003321 has 4 divisors (see below), whose sum is σ = 21581206987044. Its totient is φ = 20885039019600.

The previous prime is 21233123003317. The next prime is 21233123003353. The reversal of 21233123003321 is 12330032133212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5131674702400 + 16101448300921 = 2265320^2 + 4012661^2 .

It is a cyclic number.

It is not a de Polignac number, because 21233123003321 - 2² = 21233123003317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21233123003821) 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, 174041991770 + ... + 174041991891.

It is an arithmetic number, because the mean of its divisors is an integer number (5395301746761).

Almost surely, 2^{21233123003321} is an apocalyptic number.

It is an amenable number.

21233123003321 is a deficient number, since it is larger than the sum of its proper divisors (348083983723).

21233123003321 is an equidigital number, since it uses as much as digits as its factorization.

21233123003321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348083983722.

The product of its (nonzero) digits is 3888, while the sum is 26.

Adding to 21233123003321 its reverse (12330032133212), we get a palindrome (33563155136533).

The spelling of 21233123003321 in words is "twenty-one trillion, two hundred thirty-three billion, one hundred twenty-three million, three thousand, three hundred twenty-one".