129101291 has 8 divisors (see below), whose sum is σ = 140962368. Its totient is φ = 117261000.

The previous prime is 129101261. The next prime is 129101311. The reversal of 129101291 is 192101921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129101291 - 2⁶ = 129101227 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 129101291.

It is not an unprimeable number, because it can be changed into a prime (129101261) 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 7 ways as a sum of consecutive naturals, for example, 9656 + ... + 18746.

It is an arithmetic number, because the mean of its divisors is an integer number (17620296).

Almost surely, 2^129101291 is an apocalyptic number.

129101291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129101291 is a deficient number, since it is larger than the sum of its proper divisors (11861077).

129101291 is a wasteful number, since it uses less digits than its factorization.

129101291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10393.

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 129101291 is about 11362.2749042610. The cubic root of 129101291 is about 505.4096483305.

The spelling of 129101291 in words is "one hundred twenty-nine million, one hundred one thousand, two hundred ninety-one".