129101 has 4 divisors (see below), whose sum is σ = 147552. Its totient is φ = 110652.

The previous prime is 129097. The next prime is 129113. The reversal of 129101 is 101921.

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 129101 - 2² = 129097 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129121) 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, 9215 + ... + 9228.

It is an arithmetic number, because the mean of its divisors is an integer number (36888).

2¹²⁹¹⁰¹ is an apocalyptic number.

It is an amenable number.

129101 is a deficient number, since it is larger than the sum of its proper divisors (18451).

129101 is an equidigital number, since it uses as much as digits as its factorization.

129101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18450.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 129101 is about 359.3062760376. The cubic root of 129101 is about 50.5409268592.

The spelling of 129101 in words is "one hundred twenty-nine thousand, one hundred one".