221211111227 has 2 divisors, whose sum is σ = 221211111228. Its totient is φ = 221211111226.

The previous prime is 221211111181. The next prime is 221211111229. The reversal of 221211111227 is 722111112122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221211111227 - 2⁸ = 221211110971 is a prime.

Together with 221211111229, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221211111229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110605555613 + 110605555614.

It is an arithmetic number, because the mean of its divisors is an integer number (110605555614).

Almost surely, 2^221211111227 is an apocalyptic number.

221211111227 is a deficient number, since it is larger than the sum of its proper divisors (1).

221211111227 is an equidigital number, since it uses as much as digits as its factorization.

221211111227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 23.

Adding to 221211111227 its reverse (722111112122), we get a palindrome (943322223349).

The spelling of 221211111227 in words is "two hundred twenty-one billion, two hundred eleven million, one hundred eleven thousand, two hundred twenty-seven".