100400012 has 24 divisors (see below), whose sum is σ = 180642000. Its totient is φ = 48799296.

The previous prime is 100399973. The next prime is 100400017. The reversal of 100400012 is 210004001.

It is not an unprimeable number, because it can be changed into a prime (100400017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38114 + ... + 40662.

It is an arithmetic number, because the mean of its divisors is an integer number (7526750).

Almost surely, 2^100400012 is an apocalyptic number.

It is an amenable number.

100400012 is a deficient number, since it is larger than the sum of its proper divisors (80241988).

100400012 is a wasteful number, since it uses less digits than its factorization.

100400012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 100400012 is about 10019.9806387038. The cubic root of 100400012 is about 464.7769570469.

Adding to 100400012 its reverse (210004001), we get a palindrome (310404013).

The spelling of 100400012 in words is "one hundred million, four hundred thousand, twelve".