11221999 has 8 divisors (see below), whose sum is σ = 11748960. Its totient is φ = 10698336.

The previous prime is 11221993. The next prime is 11222021. The reversal of 11221999 is 99912211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11221999 - 2⁵ = 11221967 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8517 + ... + 9745.

It is an arithmetic number, because the mean of its divisors is an integer number (1468620).

Almost surely, 2^11221999 is an apocalyptic number.

11221999 is a deficient number, since it is larger than the sum of its proper divisors (526961).

11221999 is a wasteful number, since it uses less digits than its factorization.

11221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1649.

The product of its digits is 2916, while the sum is 34.

The square root of 11221999 is about 3349.9252230460. The cubic root of 11221999 is about 223.8841809318.

The spelling of 11221999 in words is "eleven million, two hundred twenty-one thousand, nine hundred ninety-nine".