100222221202021 has 4 divisors (see below), whose sum is σ = 100223118582412. Its totient is φ = 100221323821632.

The previous prime is 100222221202009. The next prime is 100222221202141. The reversal of 100222221202021 is 120202122222001.

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 4795600692996 + 95426620509025 = 2189886^2 + 9768655^2 .

It is a cyclic number.

It is not a de Polignac number, because 100222221202021 - 2⁵ = 100222221201989 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 100222221202021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100222221200021) 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, 448522650 + ... + 448746043.

It is an arithmetic number, because the mean of its divisors is an integer number (25055779645603).

Almost surely, 2^{100222221202021} is an apocalyptic number.

It is an amenable number.

100222221202021 is a deficient number, since it is larger than the sum of its proper divisors (897380391).

100222221202021 is an equidigital number, since it uses as much as digits as its factorization.

100222221202021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897380390.

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

Adding to 100222221202021 its reverse (120202122222001), we get a palindrome (220424343424022).

The spelling of 100222221202021 in words is "one hundred trillion, two hundred twenty-two billion, two hundred twenty-one million, two hundred two thousand, twenty-one".