100001332421 has 4 divisors (see below), whose sum is σ = 100731269292. Its totient is φ = 99271395552.

The previous prime is 100001332411. The next prime is 100001332439. The reversal of 100001332421 is 124233100001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 79563484900 + 20437847521 = 282070^2 + 142961^2 .

It is a cyclic number.

It is not a de Polignac number, because 100001332421 - 2⁶ = 100001332357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100001332421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001332411) 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, 364968230 + ... + 364968503.

It is an arithmetic number, because the mean of its divisors is an integer number (25182817323).

Almost surely, 2^100001332421 is an apocalyptic number.

It is an amenable number.

100001332421 is a deficient number, since it is larger than the sum of its proper divisors (729936871).

100001332421 is an equidigital number, since it uses as much as digits as its factorization.

100001332421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 729936870.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 100001332421 its reverse (124233100001), we get a palindrome (224234432422).

The spelling of 100001332421 in words is "one hundred billion, one million, three hundred thirty-two thousand, four hundred twenty-one".