100013211605 has 4 divisors (see below), whose sum is σ = 120015853932. Its totient is φ = 80010569280.

The previous prime is 100013211587. The next prime is 100013211629. The reversal of 100013211605 is 506112310001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 506112310001 = 17 ⋅29771312353.

It can be written as a sum of positive squares in 2 ways, for example, as 13225230001 + 86787981604 = 115001^2 + 294598^2 .

It is not a de Polignac number, because 100013211605 - 2¹⁴ = 100013195221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10001321156 + ... + 10001321165.

It is an arithmetic number, because the mean of its divisors is an integer number (30003963483).

Almost surely, 2^100013211605 is an apocalyptic number.

It is an amenable number.

100013211605 is a deficient number, since it is larger than the sum of its proper divisors (20002642327).

100013211605 is an equidigital number, since it uses as much as digits as its factorization.

100013211605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20002642326.

The product of its (nonzero) digits is 180, while the sum is 20.

Adding to 100013211605 its reverse (506112310001), we get a palindrome (606125521606).

The spelling of 100013211605 in words is "one hundred billion, thirteen million, two hundred eleven thousand, six hundred five".