109091212 has 6 divisors (see below), whose sum is σ = 190909628. Its totient is φ = 54545604.

The previous prime is 109091197. The next prime is 109091219. The reversal of 109091212 is 212190901.

It is not an unprimeable number, because it can be changed into a prime (109091219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13636398 + ... + 13636405.

Almost surely, 2^109091212 is an apocalyptic number.

It is an amenable number.

109091212 is a deficient number, since it is larger than the sum of its proper divisors (81818416).

109091212 is a wasteful number, since it uses less digits than its factorization.

109091212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27272807 (or 27272805 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 109091212 is about 10444.6738580005. The cubic root of 109091212 is about 477.8188245648.

It can be divided in two parts, 10909 and 1212, that added together give a palindrome (12121).

The spelling of 109091212 in words is "one hundred nine million, ninety-one thousand, two hundred twelve".