129101071 has 12 divisors (see below), whose sum is σ = 144239032. Its totient is φ = 115434000.

The previous prime is 129101059. The next prime is 129101099. The reversal of 129101071 is 170101921.

It is not a de Polignac number, because 129101071 - 2⁵ = 129101039 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 (129101041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1365 + ... + 16126.

Almost surely, 2^129101071 is an apocalyptic number.

129101071 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

129101071 is a deficient number, since it is larger than the sum of its proper divisors (15137961).

129101071 is a wasteful number, since it uses less digits than its factorization.

129101071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17574 (or 17563 counting only the distinct ones).

The product of its (nonzero) digits is 126, while the sum is 22.

The square root of 129101071 is about 11362.2652230970. The cubic root of 129101071 is about 505.4093612428.

Adding to 129101071 its reverse (170101921), we get a palindrome (299202992).

The spelling of 129101071 in words is "one hundred twenty-nine million, one hundred one thousand, seventy-one".