100001202221221 has 8 divisors (see below), whose sum is σ = 116718728428800. Its totient is φ = 83891586057648.

The previous prime is 100001202221149. The next prime is 100001202221287. The reversal of 100001202221221 is 122122202100001.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 100001202221221 - 2⁷ = 100001202221093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100001202221195 and 100001202221204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100001202221321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 151977510646 + ... + 151977511303.

It is an arithmetic number, because the mean of its divisors is an integer number (14589841053600).

Almost surely, 2^{100001202221221} is an apocalyptic number.

It is an amenable number.

100001202221221 is a deficient number, since it is larger than the sum of its proper divisors (16717526207579).

100001202221221 is an equidigital number, since it uses as much as digits as its factorization.

100001202221221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303955022003.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 100001202221221 its reverse (122122202100001), we get a palindrome (222123404321222).

The spelling of 100001202221221 in words is "one hundred trillion, one billion, two hundred two million, two hundred twenty-one thousand, two hundred twenty-one".