100421010421 has 4 divisors (see below), whose sum is σ = 102557627712. Its totient is φ = 98284393132.

The previous prime is 100421010419. The next prime is 100421010433. The reversal of 100421010421 is 124010124001.

It is a happy number.

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 100421010421 - 2¹ = 100421010419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100421010395 and 100421010404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421010451) 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, 1068308575 + ... + 1068308668.

It is an arithmetic number, because the mean of its divisors is an integer number (25639406928).

Almost surely, 2^100421010421 is an apocalyptic number.

It is an amenable number.

100421010421 is a deficient number, since it is larger than the sum of its proper divisors (2136617291).

100421010421 is an equidigital number, since it uses as much as digits as its factorization.

100421010421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2136617290.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100421010421 its reverse (124010124001), we get a palindrome (224431134422).

The spelling of 100421010421 in words is "one hundred billion, four hundred twenty-one million, ten thousand, four hundred twenty-one".