109212912 has 120 divisors (see below), whose sum is σ = 324979200. Its totient is φ = 34141824.

The previous prime is 109212911. The next prime is 109212941. The reversal of 109212912 is 219212901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109212911) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489633 + ... + 489855.

It is an arithmetic number, because the mean of its divisors is an integer number (2708160).

Almost surely, 2^109212912 is an apocalyptic number.

109212912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 109212912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162489600).

109212912 is an abundant number, since it is smaller than the sum of its proper divisors (215766288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

109212912 is a wasteful number, since it uses less digits than its factorization.

109212912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 435 (or 426 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 27.

The square root of 109212912 is about 10450.4981699439. The cubic root of 109212912 is about 477.9964402786.

The spelling of 109212912 in words is "one hundred nine million, two hundred twelve thousand, nine hundred twelve".