21321133320023 has 2 divisors, whose sum is σ = 21321133320024. Its totient is φ = 21321133320022.

The previous prime is 21321133319951. The next prime is 21321133320101. The reversal of 21321133320023 is 32002333112312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21321133320023 - 2¹⁸ = 21321133057879 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21321133319974 and 21321133320001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21321133320523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10660566660011 + 10660566660012.

It is an arithmetic number, because the mean of its divisors is an integer number (10660566660012).

Almost surely, 2^{21321133320023} is an apocalyptic number.

21321133320023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21321133320023 is an equidigital number, since it uses as much as digits as its factorization.

21321133320023 is an odious number, because the sum of its binary digits is odd.

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

Adding to 21321133320023 its reverse (32002333112312), we get a palindrome (53323466432335).

The spelling of 21321133320023 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirty-three million, three hundred twenty thousand, twenty-three".