221101101200221 has 24 divisors (see below), whose sum is σ = 243209958397952. Its totient is φ = 200850944263200.

The previous prime is 221101101200219. The next prime is 221101101200251. The reversal of 221101101200221 is 122002101101122.

221101101200221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221101101200221 - 2¹ = 221101101200219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 221101101200195 and 221101101200204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221101101200251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1450137931 + ... + 1450290391.

Almost surely, 2^{221101101200221} is an apocalyptic number.

It is an amenable number.

221101101200221 is a deficient number, since it is larger than the sum of its proper divisors (22108857197731).

221101101200221 is a wasteful number, since it uses less digits than its factorization.

221101101200221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161353 (or 161342 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 221101101200221 its reverse (122002101101122), we get a palindrome (343103202301343).

Subtracting from 221101101200221 its reverse (122002101101122), we obtain a palindrome (99099000099099).

The spelling of 221101101200221 in words is "two hundred twenty-one trillion, one hundred one billion, one hundred one million, two hundred thousand, two hundred twenty-one".