12221667 has 12 divisors (see below), whose sum is σ = 17867304. Its totient is φ = 8049120.

The previous prime is 12221611. The next prime is 12221669. The reversal of 12221667 is 76612221.

It is not a de Polignac number, because 12221667 - 2¹¹ = 12219619 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12221667.

It is not an unprimeable number, because it can be changed into a prime (12221669) 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, 7434 + ... + 8927.

It is an arithmetic number, because the mean of its divisors is an integer number (1488942).

Almost surely, 2^12221667 is an apocalyptic number.

12221667 is a deficient number, since it is larger than the sum of its proper divisors (5645637).

12221667 is a wasteful number, since it uses less digits than its factorization.

12221667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16450 (or 16447 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 12221667 is about 3495.9500854560. The cubic root of 12221667 is about 230.3439529289.

Adding to 12221667 its reverse (76612221), we get a palindrome (88833888).

The spelling of 12221667 in words is "twelve million, two hundred twenty-one thousand, six hundred sixty-seven".