100222122020021 has 4 divisors (see below), whose sum is σ = 101717974587552. Its totient is φ = 98726269452492.

The previous prime is 100222122019997. The next prime is 100222122020057. The reversal of 100222122020021 is 120020221222001.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 100222122020021 - 2³⁴ = 100204942150837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100222122020221) 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, 747926283665 + ... + 747926283798.

It is an arithmetic number, because the mean of its divisors is an integer number (25429493646888).

Almost surely, 2^{100222122020021} is an apocalyptic number.

It is an amenable number.

100222122020021 is a deficient number, since it is larger than the sum of its proper divisors (1495852567531).

100222122020021 is an equidigital number, since it uses as much as digits as its factorization.

100222122020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1495852567530.

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

Adding to 100222122020021 its reverse (120020221222001), we get a palindrome (220242343242022).

The spelling of 100222122020021 in words is "one hundred trillion, two hundred twenty-two billion, one hundred twenty-two million, twenty thousand, twenty-one".