111122109 has 12 divisors (see below), whose sum is σ = 183439776. Its totient is φ = 63498312.

The previous prime is 111122101. The next prime is 111122117. The reversal of 111122109 is 901221111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111122101) and next prime (111122117).

It is not a de Polignac number, because 111122109 - 2³ = 111122101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111122091 and 111122100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111122101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 881859 + ... + 881984.

It is an arithmetic number, because the mean of its divisors is an integer number (15286648).

Almost surely, 2^111122109 is an apocalyptic number.

It is an amenable number.

111122109 is a deficient number, since it is larger than the sum of its proper divisors (72317667).

111122109 is a wasteful number, since it uses less digits than its factorization.

111122109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1763856 (or 1763853 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 18.

The square root of 111122109 is about 10541.4471966614. The cubic root of 111122109 is about 480.7657179464.

It can be divided in two parts, 1111 and 22109, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 111122109 in words is "one hundred eleven million, one hundred twenty-two thousand, one hundred nine".