11221667 has 4 divisors (see below), whose sum is σ = 11482680. Its totient is φ = 10960656.

The previous prime is 11221663. The next prime is 11221669. The reversal of 11221667 is 76612211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76612211 = 13 ⋅5893247.

It is a cyclic number.

It is not a de Polignac number, because 11221667 - 2² = 11221663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11221663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130442 + ... + 130527.

It is an arithmetic number, because the mean of its divisors is an integer number (2870670).

Almost surely, 2^11221667 is an apocalyptic number.

11221667 is a deficient number, since it is larger than the sum of its proper divisors (261013).

11221667 is an equidigital number, since it uses as much as digits as its factorization.

11221667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261012.

The product of its digits is 1008, while the sum is 26.

The square root of 11221667 is about 3349.8756693346. The cubic root of 11221667 is about 223.8819730578.

Adding to 11221667 its reverse (76612211), we get a palindrome (87833878).

The spelling of 11221667 in words is "eleven million, two hundred twenty-one thousand, six hundred sixty-seven".