4102102181 has 2 divisors, whose sum is σ = 4102102182. Its totient is φ = 4102102180.

The previous prime is 4102102139. The next prime is 4102102201. The reversal of 4102102181 is 1812012014.

It is an a-pointer prime, because the next prime (4102102201) can be obtained adding 4102102181 to its sum of digits (20).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2730585025 + 1371517156 = 52255^2 + 37034^2 .

It is a cyclic number.

It is not a de Polignac number, because 4102102181 - 2⁶ = 4102102117 is a prime.

It is a super-4 number, since 4×4102102181⁴ (a number of 40 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4102102681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2051051090 + 2051051091.

It is an arithmetic number, because the mean of its divisors is an integer number (2051051091).

Almost surely, 2^4102102181 is an apocalyptic number.

It is an amenable number.

4102102181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4102102181 is an equidigital number, since it uses as much as digits as its factorization.

4102102181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128, while the sum is 20.

The square root of 4102102181 is about 64047.6555464757. The cubic root of 4102102181 is about 1600.7941605706.

Adding to 4102102181 its reverse (1812012014), we get a palindrome (5914114195).

The spelling of 4102102181 in words is "four billion, one hundred two million, one hundred two thousand, one hundred eighty-one".