21101020322303 has 4 divisors (see below), whose sum is σ = 21781698397248. Its totient is φ = 20420342247360.

The previous prime is 21101020322257. The next prime is 21101020322329. The reversal of 21101020322303 is 30322302010112.

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 21101020322303 - 2²⁸ = 21100751886847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21101020324303) 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, 340339037426 + ... + 340339037487.

It is an arithmetic number, because the mean of its divisors is an integer number (5445424599312).

Almost surely, 2^{21101020322303} is an apocalyptic number.

21101020322303 is a deficient number, since it is larger than the sum of its proper divisors (680678074945).

21101020322303 is an equidigital number, since it uses as much as digits as its factorization.

21101020322303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680678074944.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21101020322303 its reverse (30322302010112), we get a palindrome (51423322332415).

The spelling of 21101020322303 in words is "twenty-one trillion, one hundred one billion, twenty million, three hundred twenty-two thousand, three hundred three".