211200122171 has 2 divisors, whose sum is σ = 211200122172. Its totient is φ = 211200122170.

The previous prime is 211200122167. The next prime is 211200122179. The reversal of 211200122171 is 171221002112.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 211200122171 - 2² = 211200122167 is a prime.

It is not a weakly prime, because it can be changed into another prime (211200122179) 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, 105600061085 + 105600061086.

It is an arithmetic number, because the mean of its divisors is an integer number (105600061086).

Almost surely, 2^211200122171 is an apocalyptic number.

211200122171 is a deficient number, since it is larger than the sum of its proper divisors (1).

211200122171 is an equidigital number, since it uses as much as digits as its factorization.

211200122171 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 211200122171 its reverse (171221002112), we get a palindrome (382421124283).

The spelling of 211200122171 in words is "two hundred eleven billion, two hundred million, one hundred twenty-two thousand, one hundred seventy-one".