109212078 has 16 divisors (see below), whose sum is σ = 220879440. Its totient is φ = 35994816.

The previous prime is 109212043. The next prime is 109212079. The reversal of 109212078 is 870212901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (109212079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101725 + ... + 102792.

It is an arithmetic number, because the mean of its divisors is an integer number (13804965).

Almost surely, 2^109212078 is an apocalyptic number.

109212078 is an abundant number, since it is smaller than the sum of its proper divisors (111667362).

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

109212078 is a wasteful number, since it uses less digits than its factorization.

109212078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204611.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 109212078 is about 10450.4582674637. The cubic root of 109212078 is about 477.9952235420.

Adding to 109212078 its reverse (870212901), we get a palindrome (979424979).

The spelling of 109212078 in words is "one hundred nine million, two hundred twelve thousand, seventy-eight".