42100124161 has 2 divisors, whose sum is σ = 42100124162. Its totient is φ = 42100124160.

The previous prime is 42100124153. The next prime is 42100124179. The reversal of 42100124161 is 16142100124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21781332225 + 20318791936 = 147585^2 + 142544^2 .

It is a cyclic number.

It is not a de Polignac number, because 42100124161 - 2³ = 42100124153 is a prime.

It is not a weakly prime, because it can be changed into another prime (42100124191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050062080 + 21050062081.

It is an arithmetic number, because the mean of its divisors is an integer number (21050062081).

Almost surely, 2^42100124161 is an apocalyptic number.

It is an amenable number.

42100124161 is a deficient number, since it is larger than the sum of its proper divisors (1).

42100124161 is an equidigital number, since it uses as much as digits as its factorization.

42100124161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 22.

Adding to 42100124161 its reverse (16142100124), we get a palindrome (58242224285).

The spelling of 42100124161 in words is "forty-two billion, one hundred million, one hundred twenty-four thousand, one hundred sixty-one".