12111397 has 2 divisors, whose sum is σ = 12111398. Its totient is φ = 12111396.

The previous prime is 12111391. The next prime is 12111419. The reversal of 12111397 is 79311121.

12111397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10751841 + 1359556 = 3279^2 + 1166^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111397 - 2⁷ = 12111269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12111391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6055698 + 6055699.

It is an arithmetic number, because the mean of its divisors is an integer number (6055699).

Almost surely, 2^12111397 is an apocalyptic number.

It is an amenable number.

12111397 is a deficient number, since it is larger than the sum of its proper divisors (1).

12111397 is an equidigital number, since it uses as much as digits as its factorization.

12111397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 378, while the sum is 25.

The square root of 12111397 is about 3480.1432441783. The cubic root of 12111397 is about 229.6490994498.

The spelling of 12111397 in words is "twelve million, one hundred eleven thousand, three hundred ninety-seven".