21200320201023 has 12 divisors (see below), whose sum is σ = 30622736270880. Its totient is φ = 14133523014816.

The previous prime is 21200320201001. The next prime is 21200320201031. The reversal of 21200320201023 is 32010202300212.

21200320201023 is a `hidden beast` number, since 2 + 120 + 0 + 320 + 201 + 0 + 23 = 666.

It is not a de Polignac number, because 21200320201023 - 2⁸ = 21200320200767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21200320200987 and 21200320201005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21200320701023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4932163 + ... + 8168651.

It is an arithmetic number, because the mean of its divisors is an integer number (2551894689240).

Almost surely, 2^{21200320201023} is an apocalyptic number.

21200320201023 is a deficient number, since it is larger than the sum of its proper divisors (9422416069857).

21200320201023 is a wasteful number, since it uses less digits than its factorization.

21200320201023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3964318 (or 3964315 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21200320201023 its reverse (32010202300212), we get a palindrome (53210522501235).

The spelling of 21200320201023 in words is "twenty-one trillion, two hundred billion, three hundred twenty million, two hundred one thousand, twenty-three".