21000002200223 has 4 divisors (see below), whose sum is σ = 21125750716560. Its totient is φ = 20874253683888.

The previous prime is 21000002200159. The next prime is 21000002200237. The reversal of 21000002200223 is 32200220000012.

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 21000002200223 - 2⁶ = 21000002200159 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21000002200198 and 21000002200207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21000002205223) 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, 62874257918 + ... + 62874258251.

It is an arithmetic number, because the mean of its divisors is an integer number (5281437679140).

Almost surely, 2^{21000002200223} is an apocalyptic number.

21000002200223 is a deficient number, since it is larger than the sum of its proper divisors (125748516337).

21000002200223 is a wasteful number, since it uses less digits than its factorization.

21000002200223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125748516336.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21000002200223 its reverse (32200220000012), we get a palindrome (53200222200235).

The spelling of 21000002200223 in words is "twenty-one trillion, two million, two hundred thousand, two hundred twenty-three".