100012505503 has 16 divisors (see below), whose sum is σ = 110663815680. Its totient is φ = 89984151936.

The previous prime is 100012505479. The next prime is 100012505543. The reversal of 100012505503 is 305505210001.

It is not a de Polignac number, because 100012505503 - 2⁵ = 100012505471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100012505543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421133 + ... + 1489846.

It is an arithmetic number, because the mean of its divisors is an integer number (6916488480).

Almost surely, 2^100012505503 is an apocalyptic number.

100012505503 is a deficient number, since it is larger than the sum of its proper divisors (10651310177).

100012505503 is a wasteful number, since it uses less digits than its factorization.

100012505503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911086.

The product of its (nonzero) digits is 750, while the sum is 22.

Adding to 100012505503 its reverse (305505210001), we get a palindrome (405517715504).

The spelling of 100012505503 in words is "one hundred billion, twelve million, five hundred five thousand, five hundred three".