100099229921 has 4 divisors (see below), whose sum is σ = 100440865812. Its totient is φ = 99757594032.

The previous prime is 100099229911. The next prime is 100099229947. The reversal of 100099229921 is 129922990001.

It is a happy number.

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 97893894400 + 2205335521 = 312880^2 + 46961^2 .

It is a cyclic number.

It is not a de Polignac number, because 100099229921 - 2¹⁰ = 100099228897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100099229911) 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, 170817506 + ... + 170818091.

It is an arithmetic number, because the mean of its divisors is an integer number (25110216453).

Almost surely, 2^100099229921 is an apocalyptic number.

It is an amenable number.

100099229921 is a deficient number, since it is larger than the sum of its proper divisors (341635891).

100099229921 is an equidigital number, since it uses as much as digits as its factorization.

100099229921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341635890.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 100099229921 in words is "one hundred billion, ninety-nine million, two hundred twenty-nine thousand, nine hundred twenty-one".