100221011021 has 4 divisors (see below), whose sum is σ = 100437471552. Its totient is φ = 100004550492.

The previous prime is 100221010987. The next prime is 100221011113. The reversal of 100221011021 is 120110122001.

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 100221011021 - 2¹⁴ = 100220994637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100221010993 and 100221011011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221011621) 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, 108229571 + ... + 108230496.

It is an arithmetic number, because the mean of its divisors is an integer number (25109367888).

Almost surely, 2^100221011021 is an apocalyptic number.

It is an amenable number.

100221011021 is a deficient number, since it is larger than the sum of its proper divisors (216460531).

100221011021 is an equidigital number, since it uses as much as digits as its factorization.

100221011021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216460530.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 100221011021 its reverse (120110122001), we get a palindrome (220331133022).

The spelling of 100221011021 in words is "one hundred billion, two hundred twenty-one million, eleven thousand, twenty-one".