210111210221117 has 2 divisors, whose sum is σ = 210111210221118. Its totient is φ = 210111210221116.

The previous prime is 210111210221071. The next prime is 210111210221167. The reversal of 210111210221117 is 711122012111012.

210111210221117 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 can be written as a sum of positive squares in only one way, i.e., 135048896070916 + 75062314150201 = 11621054^2 + 8663851^2 .

It is a cyclic number.

It is not a de Polignac number, because 210111210221117 - 2²⁴ = 210111193443901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210111210221092 and 210111210221101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210111210221167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105055605110558 + 105055605110559.

It is an arithmetic number, because the mean of its divisors is an integer number (105055605110559).

Almost surely, 2^{210111210221117} is an apocalyptic number.

It is an amenable number.

210111210221117 is a deficient number, since it is larger than the sum of its proper divisors (1).

210111210221117 is an equidigital number, since it uses as much as digits as its factorization.

210111210221117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 23.

Adding to 210111210221117 its reverse (711122012111012), we get a palindrome (921233222332129).

The spelling of 210111210221117 in words is "two hundred ten trillion, one hundred eleven billion, two hundred ten million, two hundred twenty-one thousand, one hundred seventeen".