221227111 has 8 divisors (see below), whose sum is σ = 257991200. Its totient is φ = 189622944.

The previous prime is 221227093. The next prime is 221227151. The reversal of 221227111 is 111722122.

It is not a de Polignac number, because 221227111 - 2⁵ = 221227079 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 (221227151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 322146 + ... + 322831.

It is an arithmetic number, because the mean of its divisors is an integer number (32248900).

Almost surely, 2^221227111 is an apocalyptic number.

221227111 is a deficient number, since it is larger than the sum of its proper divisors (36764089).

221227111 is an frugal number, since it uses more digits than its factorization.

221227111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644998 (or 644984 counting only the distinct ones).

The product of its digits is 112, while the sum is 19.

The square root of 221227111 is about 14873.7053554251. The cubic root of 221227111 is about 604.8013928152.

Adding to 221227111 its reverse (111722122), we get a palindrome (332949233).

The spelling of 221227111 in words is "two hundred twenty-one million, two hundred twenty-seven thousand, one hundred eleven".