100221021205 has 8 divisors (see below), whose sum is σ = 120302792352. Its totient is φ = 80151772368.

The previous prime is 100221021181. The next prime is 100221021211. The reversal of 100221021205 is 502120122001.

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 a de Polignac number, because none of the positive numbers 2^k-100221021205 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3112959 + ... + 3144988.

It is an arithmetic number, because the mean of its divisors is an integer number (15037849044).

Almost surely, 2^100221021205 is an apocalyptic number.

It is an amenable number.

100221021205 is a deficient number, since it is larger than the sum of its proper divisors (20081771147).

100221021205 is an equidigital number, since it uses as much as digits as its factorization.

100221021205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6261155.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 100221021205 its reverse (502120122001), we get a palindrome (602341143206).

The spelling of 100221021205 in words is "one hundred billion, two hundred twenty-one million, twenty-one thousand, two hundred five".