222221071 has 2 divisors, whose sum is σ = 222221072. Its totient is φ = 222221070.

The previous prime is 222221063. The next prime is 222221137. The reversal of 222221071 is 170122222.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 222221071 - 2³ = 222221063 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222221771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111110535 + 111110536.

It is an arithmetic number, because the mean of its divisors is an integer number (111110536).

Almost surely, 2^222221071 is an apocalyptic number.

222221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

222221071 is an equidigital number, since it uses as much as digits as its factorization.

222221071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 222221071 is about 14907.0812367814. The cubic root of 222221071 is about 605.7058183208.

Adding to 222221071 its reverse (170122222), we get a palindrome (392343293).

The spelling of 222221071 in words is "two hundred twenty-two million, two hundred twenty-one thousand, seventy-one".