42100124069 has 2 divisors, whose sum is σ = 42100124070. Its totient is φ = 42100124068.

The previous prime is 42100124063. The next prime is 42100124137. The reversal of 42100124069 is 96042100124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40597011169 + 1503112900 = 201487^2 + 38770^2 .

It is a cyclic number.

It is not a de Polignac number, because 42100124069 - 2²⁴ = 42083346853 is a prime.

It is a super-2 number, since 2×42100124069² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42100124063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21050062034 + 21050062035.

It is an arithmetic number, because the mean of its divisors is an integer number (21050062035).

Almost surely, 2^42100124069 is an apocalyptic number.

It is an amenable number.

42100124069 is a deficient number, since it is larger than the sum of its proper divisors (1).

42100124069 is an equidigital number, since it uses as much as digits as its factorization.

42100124069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 29.

The spelling of 42100124069 in words is "forty-two billion, one hundred million, one hundred twenty-four thousand, sixty-nine".