111099121 has 12 divisors (see below), whose sum is σ = 129815220. Its totient is φ = 94802400.

The previous prime is 111099103. The next prime is 111099139. The reversal of 111099121 is 121990111.

It is an interprime number because it is at equal distance from previous prime (111099103) and next prime (111099139).

It can be written as a sum of positive squares in 2 ways, for example, as 105165025 + 5934096 = 10255^2 + 2436^2 .

It is not a de Polignac number, because 111099121 - 2¹⁷ = 110968049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111099181) 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 11 ways as a sum of consecutive naturals, for example, 6271 + ... + 16171.

It is an arithmetic number, because the mean of its divisors is an integer number (10817935).

Almost surely, 2^111099121 is an apocalyptic number.

It is an amenable number.

111099121 is a deficient number, since it is larger than the sum of its proper divisors (18716099).

111099121 is an equidigital number, since it uses as much as digits as its factorization.

111099121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10144 (or 10137 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 25.

The square root of 111099121 is about 10540.3567776428. The cubic root of 111099121 is about 480.7325634145.

The spelling of 111099121 in words is "one hundred eleven million, ninety-nine thousand, one hundred twenty-one".