100012188 has 24 divisors (see below), whose sum is σ = 243508608. Its totient is φ = 31887856.

The previous prime is 100012163. The next prime is 100012189. The reversal of 100012188 is 881210001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100012189) 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, 180906 + ... + 181457.

It is an arithmetic number, because the mean of its divisors is an integer number (10146192).

Almost surely, 2^100012188 is an apocalyptic number.

It is an amenable number.

100012188 is an abundant number, since it is smaller than the sum of its proper divisors (143496420).

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

100012188 is a wasteful number, since it uses less digits than its factorization.

100012188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362393 (or 362391 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 21.

The square root of 100012188 is about 10000.6093814327. The cubic root of 100012188 is about 464.1777398235.

Adding to 100012188 its reverse (881210001), we get a palindrome (981222189).

The spelling of 100012188 in words is "one hundred million, twelve thousand, one hundred eighty-eight".