21321233330023 has 8 divisors (see below), whose sum is σ = 23296388651136. Its totient is φ = 19352221572600.

The previous prime is 21321233329973. The next prime is 21321233330051. The reversal of 21321233330023 is 32003333212312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21321233330023 - 2²⁵ = 21321199775591 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21321233329973 and 21321233330000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321233330063) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1535883661 + ... + 1535897542.

It is an arithmetic number, because the mean of its divisors is an integer number (2912048581392).

Almost surely, 2^{21321233330023} is an apocalyptic number.

21321233330023 is a deficient number, since it is larger than the sum of its proper divisors (1975155321113).

21321233330023 is a wasteful number, since it uses less digits than its factorization.

21321233330023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071781845.

The product of its (nonzero) digits is 11664, while the sum is 28.

Adding to 21321233330023 its reverse (32003333212312), we get a palindrome (53324566542335).

The spelling of 21321233330023 in words is "twenty-one trillion, three hundred twenty-one billion, two hundred thirty-three million, three hundred thirty thousand, twenty-three".