213111271 has 2 divisors, whose sum is σ = 213111272. Its totient is φ = 213111270.

The previous prime is 213111263. The next prime is 213111323. The reversal of 213111271 is 172111312.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 213111271 - 2³ = 213111263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213111211) 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, 106555635 + 106555636.

It is an arithmetic number, because the mean of its divisors is an integer number (106555636).

Almost surely, 2^213111271 is an apocalyptic number.

213111271 is a deficient number, since it is larger than the sum of its proper divisors (1).

213111271 is an equidigital number, since it uses as much as digits as its factorization.

213111271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 19.

The square root of 213111271 is about 14598.3311032460. The cubic root of 213111271 is about 597.3132377317.

Adding to 213111271 its reverse (172111312), we get a palindrome (385222583).

The spelling of 213111271 in words is "two hundred thirteen million, one hundred eleven thousand, two hundred seventy-one".