111020009 has 4 divisors (see below), whose sum is σ = 111415380. Its totient is φ = 110624640.

The previous prime is 111020003. The next prime is 111020029. The reversal of 111020009 is 900020111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 900020111 = 863 ⋅1042897.

It can be written as a sum of positive squares in 2 ways, for example, as 85969984 + 25050025 = 9272^2 + 5005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111020009 is a prime.

It is a super-3 number, since 3×111020009³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111019975 and 111020002.

It is not an unprimeable number, because it can be changed into a prime (111020003) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197264 + ... + 197825.

It is an arithmetic number, because the mean of its divisors is an integer number (27853845).

Almost surely, 2^111020009 is an apocalyptic number.

It is an amenable number.

111020009 is a deficient number, since it is larger than the sum of its proper divisors (395371).

111020009 is an equidigital number, since it uses as much as digits as its factorization.

111020009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395370.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 111020009 is about 10536.6032951801. The cubic root of 111020009 is about 480.6184288619.

The spelling of 111020009 in words is "one hundred eleven million, twenty thousand, nine".