100450021321 has 16 divisors (see below), whose sum is σ = 110650796368. Its totient is φ = 90622022400.

The previous prime is 100450021307. The next prime is 100450021349. The reversal of 100450021321 is 123120054001.

It can be written as a sum of positive squares in 8 ways, for example, as 58014021321 + 42436000000 = 240861^2 + 206000^2 .

It is not a de Polignac number, because 100450021321 - 2⁷ = 100450021193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100450021381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278910 + ... + 527911.

It is an arithmetic number, because the mean of its divisors is an integer number (6915674773).

Almost surely, 2^100450021321 is an apocalyptic number.

It is an amenable number.

100450021321 is a deficient number, since it is larger than the sum of its proper divisors (10200775047).

100450021321 is a wasteful number, since it uses less digits than its factorization.

100450021321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807052.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 100450021321 its reverse (123120054001), we get a palindrome (223570075322).

The spelling of 100450021321 in words is "one hundred billion, four hundred fifty million, twenty-one thousand, three hundred twenty-one".