12271999 has 2 divisors, whose sum is σ = 12272000. Its totient is φ = 12271998.

The previous prime is 12271969. The next prime is 12272003. The reversal of 12271999 is 99917221.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12271999 - 2⁷ = 12271871 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12271969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6135999 + 6136000.

It is an arithmetic number, because the mean of its divisors is an integer number (6136000).

Almost surely, 2^12271999 is an apocalyptic number.

12271999 is a deficient number, since it is larger than the sum of its proper divisors (1).

12271999 is an equidigital number, since it uses as much as digits as its factorization.

12271999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20412, while the sum is 40.

The square root of 12271999 is about 3503.1413046008. The cubic root of 12271999 is about 230.6597252618.

It can be divided in two parts, 122 and 71999, that multiplied together give a palindrome (8783878).

The spelling of 12271999 in words is "twelve million, two hundred seventy-one thousand, nine hundred ninety-nine".