221100221071 has 2 divisors, whose sum is σ = 221100221072. Its totient is φ = 221100221070.

The previous prime is 221100221063. The next prime is 221100221077. The reversal of 221100221071 is 170122001122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221100221071 - 2³ = 221100221063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221100221077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110550110535 + 110550110536.

It is an arithmetic number, because the mean of its divisors is an integer number (110550110536).

Almost surely, 2^221100221071 is an apocalyptic number.

221100221071 is a deficient number, since it is larger than the sum of its proper divisors (1).

221100221071 is an equidigital number, since it uses as much as digits as its factorization.

221100221071 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 19.

Adding to 221100221071 its reverse (170122001122), we get a palindrome (391222222193).

The spelling of 221100221071 in words is "two hundred twenty-one billion, one hundred million, two hundred twenty-one thousand, seventy-one".