42111020129 has 2 divisors, whose sum is σ = 42111020130. Its totient is φ = 42111020128.

The previous prime is 42111020117. The next prime is 42111020179. The reversal of 42111020129 is 92102011124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41046760000 + 1064260129 = 202600^2 + 32623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42111020129 is a prime.

It is not a weakly prime, because it can be changed into another prime (42111020179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21055510064 + 21055510065.

It is an arithmetic number, because the mean of its divisors is an integer number (21055510065).

Almost surely, 2^42111020129 is an apocalyptic number.

It is an amenable number.

42111020129 is a deficient number, since it is larger than the sum of its proper divisors (1).

42111020129 is an equidigital number, since it uses as much as digits as its factorization.

42111020129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 288, while the sum is 23.

The spelling of 42111020129 in words is "forty-two billion, one hundred eleven million, twenty thousand, one hundred twenty-nine".