221323204111 has 4 divisors (see below), whose sum is σ = 221341493800. Its totient is φ = 221304914424.

The previous prime is 221323204097. The next prime is 221323204133. The reversal of 221323204111 is 111402323122.

221323204111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 221323204111 - 2³⁵ = 186963465743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221323214111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9126681 + ... + 9150898.

It is an arithmetic number, because the mean of its divisors is an integer number (55335373450).

Almost surely, 2^221323204111 is an apocalyptic number.

221323204111 is a deficient number, since it is larger than the sum of its proper divisors (18289689).

221323204111 is a wasteful number, since it uses less digits than its factorization.

221323204111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18289688.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 221323204111 its reverse (111402323122), we get a palindrome (332725527233).

The spelling of 221323204111 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred four thousand, one hundred eleven".