21211100100223 has 16 divisors (see below), whose sum is σ = 23189024954880. Its totient is φ = 19241456364000.

The previous prime is 21211100100187. The next prime is 21211100100227. The reversal of 21211100100223 is 32200100111212.

It is a cyclic number.

It is not a de Polignac number, because 21211100100223 - 2¹⁷ = 21211099969151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21211100100197 and 21211100100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21211100100227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60031173 + ... + 60383473.

It is an arithmetic number, because the mean of its divisors is an integer number (1449314059680).

Almost surely, 2^{21211100100223} is an apocalyptic number.

21211100100223 is a deficient number, since it is larger than the sum of its proper divisors (1977924854657).

21211100100223 is a wasteful number, since it uses less digits than its factorization.

21211100100223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364038.

The product of its (nonzero) digits is 48, while the sum is 16.

Adding to 21211100100223 its reverse (32200100111212), we get a palindrome (53411200211435).

The spelling of 21211100100223 in words is "twenty-one trillion, two hundred eleven billion, one hundred million, one hundred thousand, two hundred twenty-three".