100420405124 has 24 divisors (see below), whose sum is σ = 191846366040. Its totient is φ = 45712975104.

The previous prime is 100420405123. The next prime is 100420405153. The reversal of 100420405124 is 421504024001.

It can be written as a sum of positive squares in 4 ways, for example, as 30004475524 + 70415929600 = 173218^2 + 265360^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 100420405124.

It is not an unprimeable number, because it can be changed into a prime (100420405123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13223339 + ... + 13230930.

It is an arithmetic number, because the mean of its divisors is an integer number (7993598585).

Almost surely, 2^100420405124 is an apocalyptic number.

It is an amenable number.

100420405124 is a deficient number, since it is larger than the sum of its proper divisors (91425960916).

100420405124 is a wasteful number, since it uses less digits than its factorization.

100420405124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26454359 (or 26454357 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

Adding to 100420405124 its reverse (421504024001), we get a palindrome (521924429125).

The spelling of 100420405124 in words is "one hundred billion, four hundred twenty million, four hundred five thousand, one hundred twenty-four".