12311219 has 2 divisors, whose sum is σ = 12311220. Its totient is φ = 12311218.

The previous prime is 12311209. The next prime is 12311251. The reversal of 12311219 is 91211321.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12311219 is a prime.

It is a super-2 number, since 2×12311219² = 303132226531922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12311219.

It is not a weakly prime, because it can be changed into another prime (12311209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6155609 + 6155610.

It is an arithmetic number, because the mean of its divisors is an integer number (6155610).

Almost surely, 2^12311219 is an apocalyptic number.

12311219 is a deficient number, since it is larger than the sum of its proper divisors (1).

12311219 is an equidigital number, since it uses as much as digits as its factorization.

12311219 is an evil number, because the sum of its binary digits is even.

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

The square root of 12311219 is about 3508.7346722145. The cubic root of 12311219 is about 230.9051852532.

The spelling of 12311219 in words is "twelve million, three hundred eleven thousand, two hundred nineteen".