100323212221 has 4 divisors (see below), whose sum is σ = 100405243872. Its totient is φ = 100241180572.

The previous prime is 100323212177. The next prime is 100323212251. The reversal of 100323212221 is 122212323001.

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 100323212221 - 2¹⁷ = 100323081149 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 (100323212251) 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, 41013991 + ... + 41016436.

It is an arithmetic number, because the mean of its divisors is an integer number (25101310968).

Almost surely, 2^100323212221 is an apocalyptic number.

It is an amenable number.

100323212221 is a deficient number, since it is larger than the sum of its proper divisors (82031651).

100323212221 is an equidigital number, since it uses as much as digits as its factorization.

100323212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82031650.

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 100323212221 its reverse (122212323001), we get a palindrome (222535535222).

The spelling of 100323212221 in words is "one hundred billion, three hundred twenty-three million, two hundred twelve thousand, two hundred twenty-one".