100320442421 has 4 divisors (see below), whose sum is σ = 100880892000. Its totient is φ = 99759992844.

The previous prime is 100320442399. The next prime is 100320442447. The reversal of 100320442421 is 124244023001.

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 100320442421 - 2¹⁸ = 100320180277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100320462421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280224521 + ... + 280224878.

It is an arithmetic number, because the mean of its divisors is an integer number (25220223000).

Almost surely, 2^100320442421 is an apocalyptic number.

It is an amenable number.

100320442421 is a deficient number, since it is larger than the sum of its proper divisors (560449579).

100320442421 is an equidigital number, since it uses as much as digits as its factorization.

100320442421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560449578.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 100320442421 its reverse (124244023001), we get a palindrome (224564465422).

The spelling of 100320442421 in words is "one hundred billion, three hundred twenty million, four hundred forty-two thousand, four hundred twenty-one".