12197231 has 2 divisors, whose sum is σ = 12197232. Its totient is φ = 12197230.

The previous prime is 12197219. The next prime is 12197233. The reversal of 12197231 is 13279121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12197231 - 2¹⁰ = 12196207 is a prime.

It is a super-2 number, since 2×12197231² = 297544888134722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 12197233, it forms a pair of twin primes.

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 12197231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12197233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6098615 + 6098616.

It is an arithmetic number, because the mean of its divisors is an integer number (6098616).

Almost surely, 2^12197231 is an apocalyptic number.

12197231 is a deficient number, since it is larger than the sum of its proper divisors (1).

12197231 is an equidigital number, since it uses as much as digits as its factorization.

12197231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 756, while the sum is 26.

The square root of 12197231 is about 3492.4534356237. The cubic root of 12197231 is about 230.1903339412.

The spelling of 12197231 in words is "twelve million, one hundred ninety-seven thousand, two hundred thirty-one".