100201022202221 has 4 divisors (see below), whose sum is σ = 100201645437852. Its totient is φ = 100200398966592.

The previous prime is 100201022202209. The next prime is 100201022202223. The reversal of 100201022202221 is 122202220102001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 87373980234025 + 12827041968196 = 9347405^2 + 3581486^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100201022202221 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 100201022202221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100201022202223) 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, 311376590 + ... + 311698223.

It is an arithmetic number, because the mean of its divisors is an integer number (25050411359463).

Almost surely, 2^{100201022202221} is an apocalyptic number.

It is an amenable number.

100201022202221 is a deficient number, since it is larger than the sum of its proper divisors (623235631).

100201022202221 is an equidigital number, since it uses as much as digits as its factorization.

100201022202221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623235630.

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

Adding to 100201022202221 its reverse (122202220102001), we get a palindrome (222403242304222).

The spelling of 100201022202221 in words is "one hundred trillion, two hundred one billion, twenty-two million, two hundred two thousand, two hundred twenty-one".