100005434121 has 4 divisors (see below), whose sum is σ = 133340578832. Its totient is φ = 66670289412.

The previous prime is 100005434117. The next prime is 100005434159. The reversal of 100005434121 is 121434500001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121434500001 = 3 ⋅40478166667.

It is not a de Polignac number, because 100005434121 - 2² = 100005434117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100005434161) 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 3 ways as a sum of consecutive naturals, for example, 16667572351 + ... + 16667572356.

It is an arithmetic number, because the mean of its divisors is an integer number (33335144708).

Almost surely, 2^100005434121 is an apocalyptic number.

It is an amenable number.

100005434121 is a deficient number, since it is larger than the sum of its proper divisors (33335144711).

100005434121 is an equidigital number, since it uses as much as digits as its factorization.

100005434121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33335144710.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 100005434121 its reverse (121434500001), we get a palindrome (221439934122).

The spelling of 100005434121 in words is "one hundred billion, five million, four hundred thirty-four thousand, one hundred twenty-one".