221200271 has 2 divisors, whose sum is σ = 221200272. Its totient is φ = 221200270.

The previous prime is 221200253. The next prime is 221200279. The reversal of 221200271 is 172002122.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221200271 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 (221200279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600135 + 110600136.

It is an arithmetic number, because the mean of its divisors is an integer number (110600136).

Almost surely, 2^221200271 is an apocalyptic number.

221200271 is a deficient number, since it is larger than the sum of its proper divisors (1).

221200271 is an equidigital number, since it uses as much as digits as its factorization.

221200271 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 17.

The square root of 221200271 is about 14872.8030646546. The cubic root of 221200271 is about 604.7769329952.

Adding to 221200271 its reverse (172002122), we get a palindrome (393202393).

The spelling of 221200271 in words is "two hundred twenty-one million, two hundred thousand, two hundred seventy-one".