221120111111 has 4 divisors (see below), whose sum is σ = 221210699424. Its totient is φ = 221029522800.

The previous prime is 221120111101. The next prime is 221120111123. The reversal of 221120111111 is 111111021122.

221120111111 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 221120111111 - 2³⁴ = 203940241927 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 (221120111101) 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, 45290495 + ... + 45295376.

It is an arithmetic number, because the mean of its divisors is an integer number (55302674856).

Almost surely, 2^221120111111 is an apocalyptic number.

221120111111 is a deficient number, since it is larger than the sum of its proper divisors (90588313).

221120111111 is an equidigital number, since it uses as much as digits as its factorization.

221120111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90588312.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 221120111111 its reverse (111111021122), we get a palindrome (332231132233).

The spelling of 221120111111 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred eleven thousand, one hundred eleven".