12109019 has 12 divisors (see below), whose sum is σ = 13233096. Its totient is φ = 11074752.

The previous prime is 12109007. The next prime is 12109039. The reversal of 12109019 is 91090121.

It is not a de Polignac number, because 12109019 - 2⁸ = 12108763 is a prime.

It is a super-2 number, since 2×12109019² = 293256682284722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12108985 and 12109003.

It is not an unprimeable number, because it can be changed into a prime (12109039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22892 + ... + 23414.

It is an arithmetic number, because the mean of its divisors is an integer number (1102758).

Almost surely, 2^12109019 is an apocalyptic number.

12109019 is a deficient number, since it is larger than the sum of its proper divisors (1124077).

12109019 is a wasteful number, since it uses less digits than its factorization.

12109019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 673 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 12109019 is about 3479.8015748028. The cubic root of 12109019 is about 229.6340683926.

The spelling of 12109019 in words is "twelve million, one hundred nine thousand, nineteen".