100121071005 has 80 divisors (see below), whose sum is σ = 190446759360. Its totient is φ = 50147624448.

The previous prime is 100121070997. The next prime is 100121071051. The reversal of 100121071005 is 500170121001.

It is a happy number.

It is not a de Polignac number, because 100121071005 - 2³ = 100121070997 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3199726 + ... + 3230864.

It is an arithmetic number, because the mean of its divisors is an integer number (2380584492).

Almost surely, 2^100121071005 is an apocalyptic number.

100121071005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100121071005 is a deficient number, since it is larger than the sum of its proper divisors (90325688355).

100121071005 is a wasteful number, since it uses less digits than its factorization.

100121071005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31640 (or 31631 counting only the distinct ones).

The product of its (nonzero) digits is 70, while the sum is 18.

Adding to 100121071005 its reverse (500170121001), we get a palindrome (600291192006).

The spelling of 100121071005 in words is "one hundred billion, one hundred twenty-one million, seventy-one thousand, five".