100002021222221 has 8 divisors (see below), whose sum is σ = 100566806974200. Its totient is φ = 99438755756032.

The previous prime is 100002021222161. The next prime is 100002021222263. The reversal of 100002021222221 is 122222120200001.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 13213326780196 + 86788694442025 = 3635014^2 + 9316045^2 .

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 100002021222221 - 2⁴⁶ = 29633277044557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 100002021222221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100002021422221) 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, 379939520 + ... + 380202633.

It is an arithmetic number, because the mean of its divisors is an integer number (12570850871775).

Almost surely, 2^{100002021222221} is an apocalyptic number.

It is an amenable number.

100002021222221 is a deficient number, since it is larger than the sum of its proper divisors (564785751979).

100002021222221 is an equidigital number, since it uses as much as digits as its factorization.

100002021222221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760142895.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 100002021222221 its reverse (122222120200001), we get a palindrome (222224141422222).

The spelling of 100002021222221 in words is "one hundred trillion, two billion, twenty-one million, two hundred twenty-two thousand, two hundred twenty-one".