12102129 has 28 divisors (see below), whose sum is σ = 19555956. Its totient is φ = 7441632.

The previous prime is 12102127. The next prime is 12102133. The reversal of 12102129 is 92120121.

It can be written as a sum of positive squares in 2 ways, for example, as 4665600 + 7436529 = 2160^2 + 2727^2 .

It is not a de Polignac number, because 12102129 - 2¹ = 12102127 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12102127) 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 27 ways as a sum of consecutive naturals, for example, 8839 + ... + 10115.

It is an arithmetic number, because the mean of its divisors is an integer number (698427).

Almost surely, 2^12102129 is an apocalyptic number.

It is an amenable number.

12102129 is a deficient number, since it is larger than the sum of its proper divisors (7453827).

12102129 is an equidigital number, since it uses as much as digits as its factorization.

12102129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308 (or 1293 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

The square root of 12102129 is about 3478.8114349588. The cubic root of 12102129 is about 229.5905064021.

The spelling of 12102129 in words is "twelve million, one hundred two thousand, one hundred twenty-nine".