129730912105 has 4 divisors (see below), whose sum is σ = 155677094532. Its totient is φ = 103784729680.

The previous prime is 129730912099. The next prime is 129730912109. The reversal of 129730912105 is 501219037921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 96442544704 + 33288367401 = 310552^2 + 182451^2 .

It is not a de Polignac number, because 129730912105 - 2¹⁵ = 129730879337 is a prime.

It is a super-3 number, since 3×129730912105³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129730912109) 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 in 3 ways as a sum of consecutive naturals, for example, 12973091206 + ... + 12973091215.

It is an arithmetic number, because the mean of its divisors is an integer number (38919273633).

Almost surely, 2^129730912105 is an apocalyptic number.

It is an amenable number.

129730912105 is a deficient number, since it is larger than the sum of its proper divisors (25946182427).

129730912105 is an equidigital number, since it uses as much as digits as its factorization.

129730912105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25946182426.

The product of its (nonzero) digits is 34020, while the sum is 40.

The spelling of 129730912105 in words is "one hundred twenty-nine billion, seven hundred thirty million, nine hundred twelve thousand, one hundred five".