111221006 has 16 divisors (see below), whose sum is σ = 180121200. Its totient is φ = 51202368.

The previous prime is 111220999. The next prime is 111221023. The reversal of 111221006 is 600122111.

It is a super-2 number, since 2×111221006² = 24740224351304072, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5405 + ... + 15863.

It is an arithmetic number, because the mean of its divisors is an integer number (11257575).

Almost surely, 2^111221006 is an apocalyptic number.

111221006 is a deficient number, since it is larger than the sum of its proper divisors (68900194).

111221006 is a wasteful number, since it uses less digits than its factorization.

111221006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10883.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 111221006 is about 10546.1370178848. The cubic root of 111221006 is about 480.9083004005.

Adding to 111221006 its reverse (600122111), we get a palindrome (711343117).

The spelling of 111221006 in words is "one hundred eleven million, two hundred twenty-one thousand, six".