100002220221 has 4 divisors (see below), whose sum is σ = 133336293632. Its totient is φ = 66668146812.

The previous prime is 100002220207. The next prime is 100002220243. The reversal of 100002220221 is 122022200001.

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 not a de Polignac number, because 100002220221 - 2¹⁹ = 100001695933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100002220197 and 100002220206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002220271) 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, 16667036701 + ... + 16667036706.

It is an arithmetic number, because the mean of its divisors is an integer number (33334073408).

Almost surely, 2^100002220221 is an apocalyptic number.

It is an amenable number.

100002220221 is a deficient number, since it is larger than the sum of its proper divisors (33334073411).

100002220221 is an equidigital number, since it uses as much as digits as its factorization.

100002220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33334073410.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 100002220221 its reverse (122022200001), we get a palindrome (222024420222).

The spelling of 100002220221 in words is "one hundred billion, two million, two hundred twenty thousand, two hundred twenty-one".