102111161 has 2 divisors, whose sum is σ = 102111162. Its totient is φ = 102111160.

The previous prime is 102111151. The next prime is 102111173. The reversal of 102111161 is 161111201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96138025 + 5973136 = 9805^2 + 2444^2 .

It is a cyclic number.

It is not a de Polignac number, because 102111161 - 2¹⁴ = 102094777 is a prime.

It is not a weakly prime, because it can be changed into another prime (102111151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51055580 + 51055581.

It is an arithmetic number, because the mean of its divisors is an integer number (51055581).

Almost surely, 2^102111161 is an apocalyptic number.

It is an amenable number.

102111161 is a deficient number, since it is larger than the sum of its proper divisors (1).

102111161 is an equidigital number, since it uses as much as digits as its factorization.

102111161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 14.

The square root of 102111161 is about 10105.0067293397. The cubic root of 102111161 is about 467.4025434799.

Adding to 102111161 its reverse (161111201), we get a palindrome (263222362).

The spelling of 102111161 in words is "one hundred two million, one hundred eleven thousand, one hundred sixty-one".