100003421421 has 20 divisors (see below), whose sum is σ = 149473549632. Its totient is φ = 66630691368.

The previous prime is 100003421369. The next prime is 100003421429. The reversal of 100003421421 is 124124300001.

It is not a de Polignac number, because 100003421421 - 2⁷ = 100003421293 is a prime.

It is a super-2 number, since 2×100003421421² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 100003421394 and 100003421403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100003421429) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 211845 + ... + 494858.

Almost surely, 2^100003421421 is an apocalyptic number.

It is an amenable number.

100003421421 is a deficient number, since it is larger than the sum of its proper divisors (49470128211).

100003421421 is an equidigital number, since it uses as much as digits as its factorization.

100003421421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708462 (or 708453 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 100003421421 its reverse (124124300001), we get a palindrome (224127721422).

The spelling of 100003421421 in words is "one hundred billion, three million, four hundred twenty-one thousand, four hundred twenty-one".