12131219 has 2 divisors, whose sum is σ = 12131220. Its totient is φ = 12131218.

The previous prime is 12131179. The next prime is 12131257. The reversal of 12131219 is 91213121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12131219 is a prime.

It is a super-2 number, since 2×12131219² = 294332948851922, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12131219.

It is not a weakly prime, because it can be changed into another prime (12131269) 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 as a sum of consecutive naturals, namely, 6065609 + 6065610.

It is an arithmetic number, because the mean of its divisors is an integer number (6065610).

Almost surely, 2^12131219 is an apocalyptic number.

12131219 is a deficient number, since it is larger than the sum of its proper divisors (1).

12131219 is an equidigital number, since it uses as much as digits as its factorization.

12131219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108, while the sum is 20.

The square root of 12131219 is about 3482.9899511770. The cubic root of 12131219 is about 229.7743154844.

The spelling of 12131219 in words is "twelve million, one hundred thirty-one thousand, two hundred nineteen".