100221210212021 has 4 divisors (see below), whose sum is σ = 100242574789344. Its totient is φ = 100199845634700.

The previous prime is 100221210212009. The next prime is 100221210212033. The reversal of 100221210212021 is 120212012122001.

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 an interprime number because it is at equal distance from previous prime (100221210212009) and next prime (100221210212033).

It is a cyclic number.

It is not a de Polignac number, because 100221210212021 - 2¹⁴ = 100221210195637 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 (100221210232021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10682281625 + ... + 10682291006.

It is an arithmetic number, because the mean of its divisors is an integer number (25060643697336).

Almost surely, 2^{100221210212021} is an apocalyptic number.

It is an amenable number.

100221210212021 is a deficient number, since it is larger than the sum of its proper divisors (21364577323).

100221210212021 is an equidigital number, since it uses as much as digits as its factorization.

100221210212021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21364577322.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 100221210212021 its reverse (120212012122001), we get a palindrome (220433222334022).

The spelling of 100221210212021 in words is "one hundred trillion, two hundred twenty-one billion, two hundred ten million, two hundred twelve thousand, twenty-one".