126128401129 has 4 divisors (see below), whose sum is σ = 126883661184. Its totient is φ = 125373141076.

The previous prime is 126128401117. The next prime is 126128401181. The reversal of 126128401129 is 921104821621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 126128401129 - 2¹⁵ = 126128368361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (126128401199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 377629777 + ... + 377630110.

It is an arithmetic number, because the mean of its divisors is an integer number (31720915296).

Almost surely, 2^126128401129 is an apocalyptic number.

It is an amenable number.

126128401129 is a deficient number, since it is larger than the sum of its proper divisors (755260055).

126128401129 is an equidigital number, since it uses as much as digits as its factorization.

126128401129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 755260054.

The product of its (nonzero) digits is 13824, while the sum is 37.

The spelling of 126128401129 in words is "one hundred twenty-six billion, one hundred twenty-eight million, four hundred one thousand, one hundred twenty-nine".