221070271 has 2 divisors, whose sum is σ = 221070272. Its totient is φ = 221070270.

The previous prime is 221070233. The next prime is 221070293. The reversal of 221070271 is 172070122.

It is an a-pointer prime, because the next prime (221070293) can be obtained adding 221070271 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221070271 - 2²³ = 212681663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221077271) 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, 110535135 + 110535136.

It is an arithmetic number, because the mean of its divisors is an integer number (110535136).

Almost surely, 2^221070271 is an apocalyptic number.

221070271 is a deficient number, since it is larger than the sum of its proper divisors (1).

221070271 is an equidigital number, since it uses as much as digits as its factorization.

221070271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 392, while the sum is 22.

The square root of 221070271 is about 14868.4320289666. The cubic root of 221070271 is about 604.6584334294.

The spelling of 221070271 in words is "two hundred twenty-one million, seventy thousand, two hundred seventy-one".