11220999 has 16 divisors (see below), whose sum is σ = 15642720. Its totient is φ = 7145600.

The previous prime is 11220997. The next prime is 11221009. The reversal of 11220999 is 99902211.

It is not a de Polignac number, because 11220999 - 2¹ = 11220997 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11220991) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8149 + ... + 9425.

It is an arithmetic number, because the mean of its divisors is an integer number (977670).

Almost surely, 2^11220999 is an apocalyptic number.

11220999 is a deficient number, since it is larger than the sum of its proper divisors (4421721).

11220999 is a wasteful number, since it uses less digits than its factorization.

11220999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1410.

The product of its (nonzero) digits is 2916, while the sum is 33.

The square root of 11220999 is about 3349.7759626578. The cubic root of 11220999 is about 223.8775305768.

The spelling of 11220999 in words is "eleven million, two hundred twenty thousand, nine hundred ninety-nine".