100421421 has 8 divisors (see below), whose sum is σ = 133974624. Its totient is φ = 66907920.

The previous prime is 100421417. The next prime is 100421429. The reversal of 100421421 is 124124001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 100421421 - 2² = 100421417 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100421421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100421429) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3411 + ... + 14576.

It is an arithmetic number, because the mean of its divisors is an integer number (16746828).

Almost surely, 2^100421421 is an apocalyptic number.

It is an amenable number.

100421421 is a deficient number, since it is larger than the sum of its proper divisors (33553203).

100421421 is a wasteful number, since it uses less digits than its factorization.

100421421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19851.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 100421421 is about 10021.0488971963. The cubic root of 100421421 is about 464.8099905845.

Adding to 100421421 its reverse (124124001), we get a palindrome (224545422).

The spelling of 100421421 in words is "one hundred million, four hundred twenty-one thousand, four hundred twenty-one".