12172219 has 2 divisors, whose sum is σ = 12172220. Its totient is φ = 12172218.

The previous prime is 12172189. The next prime is 12172253. The reversal of 12172219 is 91227121.

12172219 is an esthetic number in base 4, because in such base its adjacent digits differ by 1.

It is a weak prime.

It is an emirp because it is prime and its reverse (91227121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12172219 - 2¹⁷ = 12041147 is a prime.

It is a super-2 number, since 2×12172219² = 296325830767922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12172193 and 12172202.

It is not a weakly prime, because it can be changed into another prime (12172019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6086109 + 6086110.

It is an arithmetic number, because the mean of its divisors is an integer number (6086110).

Almost surely, 2^12172219 is an apocalyptic number.

12172219 is a deficient number, since it is larger than the sum of its proper divisors (1).

12172219 is an equidigital number, since it uses as much as digits as its factorization.

12172219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 504, while the sum is 25.

The square root of 12172219 is about 3488.8707342061. The cubic root of 12172219 is about 230.0328812473.

The spelling of 12172219 in words is "twelve million, one hundred seventy-two thousand, two hundred nineteen".