21210201320323 has 4 divisors (see below), whose sum is σ = 22132383986448. Its totient is φ = 20288018654200.

The previous prime is 21210201320317. The next prime is 21210201320327. The reversal of 21210201320323 is 32302310201212.

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

It is a cyclic number.

It is not a de Polignac number, because 21210201320323 - 2⁵ = 21210201320291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21210201320294 and 21210201320303.

It is not an unprimeable number, because it can be changed into a prime (21210201320327) 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, 461091333028 + ... + 461091333073.

It is an arithmetic number, because the mean of its divisors is an integer number (5533095996612).

Almost surely, 2^{21210201320323} is an apocalyptic number.

21210201320323 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

21210201320323 is a deficient number, since it is larger than the sum of its proper divisors (922182666125).

21210201320323 is an equidigital number, since it uses as much as digits as its factorization.

21210201320323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922182666124.

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

Adding to 21210201320323 its reverse (32302310201212), we get a palindrome (53512511521535).

The spelling of 21210201320323 in words is "twenty-one trillion, two hundred ten billion, two hundred one million, three hundred twenty thousand, three hundred twenty-three".