211021012271 has 2 divisors, whose sum is σ = 211021012272. Its totient is φ = 211021012270.

The previous prime is 211021012259. The next prime is 211021012289. The reversal of 211021012271 is 172210120112.

It is a happy number.

211021012271 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211021012271 - 2⁶ = 211021012207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211021012771) 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, 105510506135 + 105510506136.

It is an arithmetic number, because the mean of its divisors is an integer number (105510506136).

Almost surely, 2^211021012271 is an apocalyptic number.

211021012271 is a deficient number, since it is larger than the sum of its proper divisors (1).

211021012271 is an equidigital number, since it uses as much as digits as its factorization.

211021012271 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 20.

Adding to 211021012271 its reverse (172210120112), we get a palindrome (383231132383).

The spelling of 211021012271 in words is "two hundred eleven billion, twenty-one million, twelve thousand, two hundred seventy-one".