12211219 has 16 divisors (see below), whose sum is σ = 13395456. Its totient is φ = 11088000.

The previous prime is 12211217. The next prime is 12211223. The reversal of 12211219 is 91211221.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12211219 - 2¹ = 12211217 is a prime.

It is a super-2 number, since 2×12211219² = 298227738931922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12211196 and 12211205.

It is not an unprimeable number, because it can be changed into a prime (12211217) 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 15 ways as a sum of consecutive naturals, for example, 80794 + ... + 80944.

It is an arithmetic number, because the mean of its divisors is an integer number (837216).

Almost surely, 2^12211219 is an apocalyptic number.

12211219 is a deficient number, since it is larger than the sum of its proper divisors (1184237).

12211219 is a wasteful number, since it uses less digits than its factorization.

12211219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306.

The product of its digits is 72, while the sum is 19.

The square root of 12211219 is about 3494.4554654481. The cubic root of 12211219 is about 230.2782957716.

The spelling of 12211219 in words is "twelve million, two hundred eleven thousand, two hundred nineteen".