210020201111117 has 2 divisors, whose sum is σ = 210020201111118. Its totient is φ = 210020201111116.

The previous prime is 210020201111113. The next prime is 210020201111153. The reversal of 210020201111117 is 711111102020012.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 209909648851081 + 110552260036 = 14488259^2 + 332494^2 .

It is a cyclic number.

It is not a de Polignac number, because 210020201111117 - 2² = 210020201111113 is a prime.

It is a super-2 number, since 2×210020201111117² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210020201111113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010100555558 + 105010100555559.

It is an arithmetic number, because the mean of its divisors is an integer number (105010100555559).

Almost surely, 2^{210020201111117} is an apocalyptic number.

It is an amenable number.

210020201111117 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020201111117 is an equidigital number, since it uses as much as digits as its factorization.

210020201111117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 210020201111117 its reverse (711111102020012), we get a palindrome (921131303131129).

The spelling of 210020201111117 in words is "two hundred ten trillion, twenty billion, two hundred one million, one hundred eleven thousand, one hundred seventeen".