100202222221021 has 4 divisors (see below), whose sum is σ = 100350231412572. Its totient is φ = 100054213029472.

The previous prime is 100202222220977. The next prime is 100202222221033. The reversal of 100202222221021 is 120122222202001.

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 96170599968921 + 4031622252100 = 9806661^2 + 2007890^2 .

It is a cyclic number.

It is not a de Polignac number, because 100202222221021 - 2⁹ = 100202222220509 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 100202222221021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100202222221921) 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, 74004594760 + ... + 74004596113.

It is an arithmetic number, because the mean of its divisors is an integer number (25087557853143).

Almost surely, 2^{100202222221021} is an apocalyptic number.

It is an amenable number.

100202222221021 is a deficient number, since it is larger than the sum of its proper divisors (148009191551).

100202222221021 is an equidigital number, since it uses as much as digits as its factorization.

100202222221021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148009191550.

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

Adding to 100202222221021 its reverse (120122222202001), we get a palindrome (220324444423022).

The spelling of 100202222221021 in words is "one hundred trillion, two hundred two billion, two hundred twenty-two million, two hundred twenty-one thousand, twenty-one".