109121212 has 12 divisors (see below), whose sum is σ = 191037280. Its totient is φ = 54539136.

The previous prime is 109121197. The next prime is 109121239. The reversal of 109121212 is 212121901.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 109121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13213 + ... + 19819.

Almost surely, 2^109121212 is an apocalyptic number.

109121212 is the 6607-th heptagonal number.

It is an amenable number.

109121212 is a deficient number, since it is larger than the sum of its proper divisors (81916068).

109121212 is a wasteful number, since it uses less digits than its factorization.

109121212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10740 (or 10738 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 109121212 is about 10446.1098979477. The cubic root of 109121212 is about 477.8626204877.

The spelling of 109121212 in words is "one hundred nine million, one hundred twenty-one thousand, two hundred twelve".