10421105503 has 12 divisors (see below), whose sum is σ = 11207991160. Its totient is φ = 9662531472.

The previous prime is 10421105479. The next prime is 10421105531. The reversal of 10421105503 is 30550112401.

It is a happy number.

10421105503 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10421105503 - 2¹³ = 10421097311 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 (10421105573) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82176 + ... + 166117.

Almost surely, 2^10421105503 is an apocalyptic number.

10421105503 is a deficient number, since it is larger than the sum of its proper divisors (786885657).

10421105503 is an equidigital number, since it uses as much as digits as its factorization.

10421105503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248406 (or 248359 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 10421105503 its reverse (30550112401), we get a palindrome (40971217904).

The spelling of 10421105503 in words is "ten billion, four hundred twenty-one million, one hundred five thousand, five hundred three".