100003130021 has 4 divisors (see below), whose sum is σ = 100443672672. Its totient is φ = 99562587372.

The previous prime is 100003130011. The next prime is 100003130033. The reversal of 100003130021 is 120031300001.

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.

It is a cyclic number.

It is not a de Polignac number, because 100003130021 - 2²² = 99998935717 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 100003129984 and 100003130011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100003130011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220270985 + ... + 220271438.

It is an arithmetic number, because the mean of its divisors is an integer number (25110918168).

Almost surely, 2^100003130021 is an apocalyptic number.

It is an amenable number.

100003130021 is a deficient number, since it is larger than the sum of its proper divisors (440542651).

100003130021 is an equidigital number, since it uses as much as digits as its factorization.

100003130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440542650.

The product of its (nonzero) digits is 18, while the sum is 11.

Adding to 100003130021 its reverse (120031300001), we get a palindrome (220034430022).

The spelling of 100003130021 in words is "one hundred billion, three million, one hundred thirty thousand, twenty-one".