12126311 has 4 divisors (see below), whose sum is σ = 12137352. Its totient is φ = 12115272.

The previous prime is 12126307. The next prime is 12126319. The reversal of 12126311 is 11362121.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 11362121 = 173 ⋅65677.

It is a cyclic number.

It is not a de Polignac number, because 12126311 - 2² = 12126307 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12126311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12126319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3665 + ... + 6138.

It is an arithmetic number, because the mean of its divisors is an integer number (3034338).

Almost surely, 2^12126311 is an apocalyptic number.

12126311 is a deficient number, since it is larger than the sum of its proper divisors (11041).

12126311 is an equidigital number, since it uses as much as digits as its factorization.

12126311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11040.

The product of its digits is 72, while the sum is 17.

The square root of 12126311 is about 3482.2853128370. The cubic root of 12126311 is about 229.7433242472.

Adding to 12126311 its reverse (11362121), we get a palindrome (23488432).

The spelling of 12126311 in words is "twelve million, one hundred twenty-six thousand, three hundred eleven".