109381212 has 24 divisors (see below), whose sum is σ = 283581200. Its totient is φ = 36460368.

The previous prime is 109381199. The next prime is 109381219. The reversal of 109381212 is 212183901.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109381219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 506287 + ... + 506502.

Almost surely, 2^109381212 is an apocalyptic number.

109381212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

109381212 is an abundant number, since it is smaller than the sum of its proper divisors (174199988).

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

109381212 is a wasteful number, since it uses less digits than its factorization.

109381212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1012802 (or 1012794 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 109381212 is about 10458.5473178640. The cubic root of 109381212 is about 478.2418493339.

The spelling of 109381212 in words is "one hundred nine million, three hundred eighty-one thousand, two hundred twelve".