12129901 has 24 divisors (see below), whose sum is σ = 15102720. Its totient is φ = 9690912.

The previous prime is 12129889. The next prime is 12129919. The reversal of 12129901 is 10992121.

It is not a de Polignac number, because 12129901 - 2²¹ = 10032749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12129991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52855 + ... + 53083.

It is an arithmetic number, because the mean of its divisors is an integer number (629280).

Almost surely, 2^12129901 is an apocalyptic number.

It is an amenable number.

12129901 is a deficient number, since it is larger than the sum of its proper divisors (2972819).

12129901 is a wasteful number, since it uses less digits than its factorization.

12129901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 12129901 is about 3482.8007407832. The cubic root of 12129901 is about 229.7659938828.

The spelling of 12129901 in words is "twelve million, one hundred twenty-nine thousand, nine hundred one".