10403042421 has 4 divisors (see below), whose sum is σ = 13870723232. Its totient is φ = 6935361612.

The previous prime is 10403042383. The next prime is 10403042437. The reversal of 10403042421 is 12424030401.

10403042421 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12424030401 = 3 ⋅4141343467.

It is not a de Polignac number, because 10403042421 - 2⁶ = 10403042357 is a prime.

It is a super-2 number, since 2×10403042421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10403042491) 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, 1733840401 + ... + 1733840406.

It is an arithmetic number, because the mean of its divisors is an integer number (3467680808).

Almost surely, 2^10403042421 is an apocalyptic number.

It is an amenable number.

10403042421 is a deficient number, since it is larger than the sum of its proper divisors (3467680811).

10403042421 is an equidigital number, since it uses as much as digits as its factorization.

10403042421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3467680810.

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 10403042421 its reverse (12424030401), we get a palindrome (22827072822).

The spelling of 10403042421 in words is "ten billion, four hundred three million, forty-two thousand, four hundred twenty-one".