129008648101 has 4 divisors (see below), whose sum is σ = 129040896204. Its totient is φ = 128976400000.

The previous prime is 129008648089. The next prime is 129008648147. The reversal of 129008648101 is 101846800921.

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 11750343201 + 117258304900 = 108399^2 + 342430^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129008648101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129008648201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16118050 + ... + 16126051.

It is an arithmetic number, because the mean of its divisors is an integer number (32260224051).

Almost surely, 2^129008648101 is an apocalyptic number.

It is an amenable number.

129008648101 is a deficient number, since it is larger than the sum of its proper divisors (32248103).

129008648101 is an equidigital number, since it uses as much as digits as its factorization.

129008648101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32248102.

The product of its (nonzero) digits is 27648, while the sum is 40.

The spelling of 129008648101 in words is "one hundred twenty-nine billion, eight million, six hundred forty-eight thousand, one hundred one".