109012 has 6 divisors (see below), whose sum is σ = 190778. Its totient is φ = 54504.

The previous prime is 109001. The next prime is 109013. The reversal of 109012 is 210901.

It can be written as a sum of positive squares in only one way, i.e., 93636 + 15376 = 306^2 + 124^2 .

It is a super-2 number, since 2×109012² = 23767232288, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 108983 and 109001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109013) by changing a digit.

109012 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13623 + ... + 13630.

2¹⁰⁹⁰¹² is an apocalyptic number.

It is an amenable number.

109012 is a deficient number, since it is larger than the sum of its proper divisors (81766).

109012 is a wasteful number, since it uses less digits than its factorization.

109012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27257 (or 27255 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 109012 is about 330.1696533602. The cubic root of 109012 is about 47.7703147208.

Adding to 109012 its reverse (210901), we get a palindrome (319913).

The spelling of 109012 in words is "one hundred nine thousand, twelve".