21033302321143 has 4 divisors (see below), whose sum is σ = 24038059795600. Its totient is φ = 18028544846688.

The previous prime is 21033302321099. The next prime is 21033302321147. The reversal of 21033302321143 is 34112320333012.

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

It is a cyclic number.

It is not a de Polignac number, because 21033302321143 - 2⁹ = 21033302320631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21033302321147) 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, 1502378737218 + ... + 1502378737231.

It is an arithmetic number, because the mean of its divisors is an integer number (6009514948900).

Almost surely, 2^{21033302321143} is an apocalyptic number.

21033302321143 is a deficient number, since it is larger than the sum of its proper divisors (3004757474457).

21033302321143 is an equidigital number, since it uses as much as digits as its factorization.

21033302321143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3004757474456.

The product of its (nonzero) digits is 7776, while the sum is 28.

Adding to 21033302321143 its reverse (34112320333012), we get a palindrome (55145622654155).

The spelling of 21033302321143 in words is "twenty-one trillion, thirty-three billion, three hundred two million, three hundred twenty-one thousand, one hundred forty-three".