12116129 has 4 divisors (see below), whose sum is σ = 12753840. Its totient is φ = 11478420.

The previous prime is 12116123. The next prime is 12116141. The reversal of 12116129 is 92161121.

It is a happy number.

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 12116129 - 2¹⁶ = 12050593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12116123) 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, 318827 + ... + 318864.

It is an arithmetic number, because the mean of its divisors is an integer number (3188460).

Almost surely, 2^12116129 is an apocalyptic number.

12116129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

12116129 is a deficient number, since it is larger than the sum of its proper divisors (637711).

12116129 is an equidigital number, since it uses as much as digits as its factorization.

12116129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637710.

The product of its digits is 216, while the sum is 23.

The square root of 12116129 is about 3480.8230348583. The cubic root of 12116129 is about 229.6790040111.

It can be divided in two parts, 121 and 16129, that multiplied together give a square (1951609 = 1397²).

The spelling of 12116129 in words is "twelve million, one hundred sixteen thousand, one hundred twenty-nine".