211835122104161 has 2 divisors, whose sum is σ = 211835122104162. Its totient is φ = 211835122104160.

The previous prime is 211835122104157. The next prime is 211835122104223. The reversal of 211835122104161 is 161401221538112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173701039025761 + 38134083078400 = 13179569^2 + 6175280^2 .

It is a cyclic number.

It is not a de Polignac number, because 211835122104161 - 2² = 211835122104157 is a prime.

It is a super-2 number, since 2×211835122104161² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (211835122104101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105917561052080 + 105917561052081.

It is an arithmetic number, because the mean of its divisors is an integer number (105917561052081).

Almost surely, 2^{211835122104161} is an apocalyptic number.

It is an amenable number.

211835122104161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211835122104161 is an equidigital number, since it uses as much as digits as its factorization.

211835122104161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 38.

The spelling of 211835122104161 in words is "two hundred eleven trillion, eight hundred thirty-five billion, one hundred twenty-two million, one hundred four thousand, one hundred sixty-one".