21224211120211 has 16 divisors (see below), whose sum is σ = 24600078380160. Its totient is φ = 18108390991680.

The previous prime is 21224211120187. The next prime is 21224211120239. The reversal of 21224211120211 is 11202111242212.

It is not a de Polignac number, because 21224211120211 - 2⁵ = 21224211120179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21224211120011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 474516186 + ... + 474560911.

It is an arithmetic number, because the mean of its divisors is an integer number (1537504898760).

Almost surely, 2^{21224211120211} is an apocalyptic number.

21224211120211 is a deficient number, since it is larger than the sum of its proper divisors (3375867259949).

21224211120211 is a wasteful number, since it uses less digits than its factorization.

21224211120211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949077234.

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 21224211120211 its reverse (11202111242212), we get a palindrome (32426322362423).

The spelling of 21224211120211 in words is "twenty-one trillion, two hundred twenty-four billion, two hundred eleven million, one hundred twenty thousand, two hundred eleven".