21102210002323 has 4 divisors (see below), whose sum is σ = 21138782290600. Its totient is φ = 21065637714048.

The previous prime is 21102210002273. The next prime is 21102210002369. The reversal of 21102210002323 is 32320001220112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21102210002323 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21102210002323.

It is not an unprimeable number, because it can be changed into a prime (21102210002383) 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, 18286143273 + ... + 18286144426.

It is an arithmetic number, because the mean of its divisors is an integer number (5284695572650).

Almost surely, 2^{21102210002323} is an apocalyptic number.

21102210002323 is a deficient number, since it is larger than the sum of its proper divisors (36572288277).

21102210002323 is an equidigital number, since it uses as much as digits as its factorization.

21102210002323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36572288276.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 21102210002323 its reverse (32320001220112), we get a palindrome (53422211222435).

The spelling of 21102210002323 in words is "twenty-one trillion, one hundred two billion, two hundred ten million, two thousand, three hundred twenty-three".