21132020321023 has 2 divisors, whose sum is σ = 21132020321024. Its totient is φ = 21132020321022.

The previous prime is 21132020320969. The next prime is 21132020321051. The reversal of 21132020321023 is 32012302023112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21132020321023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21132020320985 and 21132020321003.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21132020321323) 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 as a sum of consecutive naturals, namely, 10566010160511 + 10566010160512.

It is an arithmetic number, because the mean of its divisors is an integer number (10566010160512).

Almost surely, 2^{21132020321023} is an apocalyptic number.

21132020321023 is a deficient number, since it is larger than the sum of its proper divisors (1).

21132020321023 is an equidigital number, since it uses as much as digits as its factorization.

21132020321023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21132020321023 its reverse (32012302023112), we get a palindrome (53144322344135).

The spelling of 21132020321023 in words is "twenty-one trillion, one hundred thirty-two billion, twenty million, three hundred twenty-one thousand, twenty-three".