100221202221 has 16 divisors (see below), whose sum is σ = 153729404928. Its totient is φ = 56889990000.

The previous prime is 100221202183. The next prime is 100221202273. The reversal of 100221202221 is 122202122001.

It is not a de Polignac number, because 100221202221 - 2⁶ = 100221202157 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 100221202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221202121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15799605 + ... + 15805946.

It is an arithmetic number, because the mean of its divisors is an integer number (9608087808).

Almost surely, 2^100221202221 is an apocalyptic number.

It is an amenable number.

100221202221 is a deficient number, since it is larger than the sum of its proper divisors (53508202707).

100221202221 is a wasteful number, since it uses less digits than its factorization.

100221202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31605712.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 100221202221 its reverse (122202122001), we get a palindrome (222423324222).

The spelling of 100221202221 in words is "one hundred billion, two hundred twenty-one million, two hundred two thousand, two hundred twenty-one".