211210100112161 has 2 divisors, whose sum is σ = 211210100112162. Its totient is φ = 211210100112160.

The previous prime is 211210100112101. The next prime is 211210100112191. The reversal of 211210100112161 is 161211001012112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 151202535045136 + 60007565067025 = 12296444^2 + 7746455^2 .

It is a cyclic number.

It is not a de Polignac number, because 211210100112161 - 2⁶ = 211210100112097 is a prime.

It is not a weakly prime, because it can be changed into another prime (211210100112101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105605050056080 + 105605050056081.

It is an arithmetic number, because the mean of its divisors is an integer number (105605050056081).

Almost surely, 2^{211210100112161} is an apocalyptic number.

It is an amenable number.

211210100112161 is a deficient number, since it is larger than the sum of its proper divisors (1).

211210100112161 is an equidigital number, since it uses as much as digits as its factorization.

211210100112161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 211210100112161 its reverse (161211001012112), we get a palindrome (372421101124273).

The spelling of 211210100112161 in words is "two hundred eleven trillion, two hundred ten billion, one hundred million, one hundred twelve thousand, one hundred sixty-one".