12211191 has 12 divisors (see below), whose sum is σ = 17691232. Its totient is φ = 8116416.

The previous prime is 12211169. The next prime is 12211193. The reversal of 12211191 is 19111221.

It is a happy number.

It is not a de Polignac number, because 12211191 - 2⁵ = 12211159 is a prime.

It is a super-2 number, since 2×12211191² = 298226371276962, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211193) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1455 + ... + 5151.

Almost surely, 2^12211191 is an apocalyptic number.

12211191 is a deficient number, since it is larger than the sum of its proper divisors (5480041).

12211191 is a wasteful number, since it uses less digits than its factorization.

12211191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4070 (or 4067 counting only the distinct ones).

The product of its digits is 36, while the sum is 18.

The square root of 12211191 is about 3494.4514590991. The cubic root of 12211191 is about 230.2781197642.

The spelling of 12211191 in words is "twelve million, two hundred eleven thousand, one hundred ninety-one".