221000027 has 2 divisors, whose sum is σ = 221000028. Its totient is φ = 221000026.

The previous prime is 220999997. The next prime is 221000029. The reversal of 221000027 is 720000122.

221000027 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221000027 - 2¹⁰ = 220999003 is a prime.

Together with 221000029, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 220999975 and 221000020.

It is not a weakly prime, because it can be changed into another prime (221000029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110500013 + 110500014.

It is an arithmetic number, because the mean of its divisors is an integer number (110500014).

Almost surely, 2^221000027 is an apocalyptic number.

221000027 is a deficient number, since it is larger than the sum of its proper divisors (1).

221000027 is an equidigital number, since it uses as much as digits as its factorization.

221000027 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 221000027 is about 14866.0696554267. The cubic root of 221000027 is about 604.5943842227.

Adding to 221000027 its reverse (720000122), we get a palindrome (941000149).

The spelling of 221000027 in words is "two hundred twenty-one million, twenty-seven", and thus it is an aban number.