12211867 has 2 divisors, whose sum is σ = 12211868. Its totient is φ = 12211866.

The previous prime is 12211853. The next prime is 12211907. The reversal of 12211867 is 76811221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12211867 - 2¹¹ = 12209819 is a prime.

It is not a weakly prime, because it can be changed into another prime (12211817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6105933 + 6105934.

It is an arithmetic number, because the mean of its divisors is an integer number (6105934).

Almost surely, 2^12211867 is an apocalyptic number.

12211867 is a deficient number, since it is larger than the sum of its proper divisors (1).

12211867 is an equidigital number, since it uses as much as digits as its factorization.

12211867 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1344, while the sum is 28.

The square root of 12211867 is about 3494.5481825266. The cubic root of 12211867 is about 230.2823690121.

The spelling of 12211867 in words is "twelve million, two hundred eleven thousand, eight hundred sixty-seven".