12126331 has 4 divisors (see below), whose sum is σ = 13858672. Its totient is φ = 10393992.

The previous prime is 12126319. The next prime is 12126349. The reversal of 12126331 is 13362121.

12126331 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13362121 = 43 ⋅310747.

It is not a de Polignac number, because 12126331 - 2⁵ = 12126299 is a prime.

It is a super-2 number, since 2×12126331² = 294095807043122, which contains 22 as substring.

It is a Duffinian number.

12126331 is strictly pandigital in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 12126299 and 12126308.

It is not an unprimeable number, because it can be changed into a prime (12126131) 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, 866160 + ... + 866173.

It is an arithmetic number, because the mean of its divisors is an integer number (3464668).

Almost surely, 2^12126331 is an apocalyptic number.

12126331 is the 2011-st hex number.

12126331 is a deficient number, since it is larger than the sum of its proper divisors (1732341).

12126331 is an equidigital number, since it uses as much as digits as its factorization.

12126331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1732340.

The product of its digits is 216, while the sum is 19.

The square root of 12126331 is about 3482.2881845132. The cubic root of 12126331 is about 229.7434505528.

Adding to 12126331 its reverse (13362121), we get a palindrome (25488452).

The spelling of 12126331 in words is "twelve million, one hundred twenty-six thousand, three hundred thirty-one".