211132110221 has 4 divisors (see below), whose sum is σ = 213308730012. Its totient is φ = 208955490432.

The previous prime is 211132110209. The next prime is 211132110269. The reversal of 211132110221 is 122011231112.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51671654596 + 159460455625 = 227314^2 + 399325^2 .

It is a cyclic number.

It is not a de Polignac number, because 211132110221 - 2³⁴ = 193952241037 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 211132110221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211132110121) 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 in 3 ways as a sum of consecutive naturals, for example, 1088309750 + ... + 1088309943.

It is an arithmetic number, because the mean of its divisors is an integer number (53327182503).

Almost surely, 2^211132110221 is an apocalyptic number.

It is an amenable number.

211132110221 is a deficient number, since it is larger than the sum of its proper divisors (2176619791).

211132110221 is an equidigital number, since it uses as much as digits as its factorization.

211132110221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2176619790.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211132110221 its reverse (122011231112), we get a palindrome (333143341333).

The spelling of 211132110221 in words is "two hundred eleven billion, one hundred thirty-two million, one hundred ten thousand, two hundred twenty-one".