100222222201021 has 4 divisors (see below), whose sum is σ = 100222264799100. Its totient is φ = 100222179602944.

The previous prime is 100222222200959. The next prime is 100222222201033. The reversal of 100222222201021 is 120102222222001.

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 15197483576025 + 85024738624996 = 3898395^2 + 9220886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100222222201021 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 100222222201021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100222222601021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17549956 + ... + 22548733.

It is an arithmetic number, because the mean of its divisors is an integer number (25055566199775).

Almost surely, 2^{100222222201021} is an apocalyptic number.

It is an amenable number.

100222222201021 is a deficient number, since it is larger than the sum of its proper divisors (42598079).

100222222201021 is an equidigital number, since it uses as much as digits as its factorization.

100222222201021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42598078.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 100222222201021 its reverse (120102222222001), we get a palindrome (220324444423022).

The spelling of 100222222201021 in words is "one hundred trillion, two hundred twenty-two billion, two hundred twenty-two million, two hundred one thousand, twenty-one".