21323333322043 has 4 divisors (see below), whose sum is σ = 21342950005120. Its totient is φ = 21303716638968.

The previous prime is 21323333322019. The next prime is 21323333322073. The reversal of 21323333322043 is 34022333332312.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21323333322043 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21323333322073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9808339908 + ... + 9808342081.

It is an arithmetic number, because the mean of its divisors is an integer number (5335737501280).

Almost surely, 2^{21323333322043} is an apocalyptic number.

21323333322043 is a deficient number, since it is larger than the sum of its proper divisors (19616683077).

21323333322043 is a wasteful number, since it uses less digits than its factorization.

21323333322043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19616683076.

The product of its (nonzero) digits is 139968, while the sum is 34.

Adding to 21323333322043 its reverse (34022333332312), we get a palindrome (55345666654355).

The spelling of 21323333322043 in words is "twenty-one trillion, three hundred twenty-three billion, three hundred thirty-three million, three hundred twenty-two thousand, forty-three".