4125511342181 has 2 divisors, whose sum is σ = 4125511342182. Its totient is φ = 4125511342180.

The previous prime is 4125511342163. The next prime is 4125511342207. The reversal of 4125511342181 is 1812431155214.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2280915472900 + 1844595869281 = 1510270^2 + 1358159^2 .

It is a cyclic number.

It is not a de Polignac number, because 4125511342181 - 2¹⁸ = 4125511080037 is a prime.

It is a super-2 number, since 2×4125511342181² (a number of 26 digits) contains 22 as substring.

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 (4125511342681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2062755671090 + 2062755671091.

It is an arithmetic number, because the mean of its divisors is an integer number (2062755671091).

Almost surely, 2^{4125511342181} is an apocalyptic number.

It is an amenable number.

4125511342181 is a deficient number, since it is larger than the sum of its proper divisors (1).

4125511342181 is an equidigital number, since it uses as much as digits as its factorization.

4125511342181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38400, while the sum is 38.

Adding to 4125511342181 its reverse (1812431155214), we get a palindrome (5937942497395).

The spelling of 4125511342181 in words is "four trillion, one hundred twenty-five billion, five hundred eleven million, three hundred forty-two thousand, one hundred eighty-one".