11221989 has 32 divisors (see below), whose sum is σ = 17182080. Its totient is φ = 6469632.

The previous prime is 11221967. The next prime is 11221993. The reversal of 11221989 is 98912211.

It is not a de Polignac number, because 11221989 - 2⁹ = 11221477 is a prime.

It is a super-2 number, since 2×11221989² = 251866074232242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11221919) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 35697 + ... + 36009.

It is an arithmetic number, because the mean of its divisors is an integer number (536940).

Almost surely, 2^11221989 is an apocalyptic number.

11221989 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

11221989 is a deficient number, since it is larger than the sum of its proper divisors (5960091).

11221989 is a wasteful number, since it uses less digits than its factorization.

11221989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389.

The product of its digits is 2592, while the sum is 33.

The square root of 11221989 is about 3349.9237304751. The cubic root of 11221989 is about 223.8841144302.

The spelling of 11221989 in words is "eleven million, two hundred twenty-one thousand, nine hundred eighty-nine".