221111100227 has 2 divisors, whose sum is σ = 221111100228. Its totient is φ = 221111100226.

The previous prime is 221111100191. The next prime is 221111100239. The reversal of 221111100227 is 722001111122.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221111100227 - 2⁸ = 221111099971 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 221111100199 and 221111100208.

It is not a weakly prime, because it can be changed into another prime (221111100257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110555550113 + 110555550114.

It is an arithmetic number, because the mean of its divisors is an integer number (110555550114).

Almost surely, 2^221111100227 is an apocalyptic number.

221111100227 is a deficient number, since it is larger than the sum of its proper divisors (1).

221111100227 is an equidigital number, since it uses as much as digits as its factorization.

221111100227 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 221111100227 its reverse (722001111122), we get a palindrome (943112211349).

The spelling of 221111100227 in words is "two hundred twenty-one billion, one hundred eleven million, one hundred thousand, two hundred twenty-seven".