100221123221 has 4 divisors (see below), whose sum is σ = 105495919200. Its totient is φ = 94946327244.

The previous prime is 100221123173. The next prime is 100221123241. The reversal of 100221123221 is 122321122001.

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 100221123221 - 2³⁰ = 99147381397 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 100221123221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100221123241) 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, 2637397961 + ... + 2637397998.

It is an arithmetic number, because the mean of its divisors is an integer number (26373979800).

Almost surely, 2^100221123221 is an apocalyptic number.

It is an amenable number.

100221123221 is a deficient number, since it is larger than the sum of its proper divisors (5274795979).

100221123221 is an equidigital number, since it uses as much as digits as its factorization.

100221123221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5274795978.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 100221123221 its reverse (122321122001), we get a palindrome (222542245222).

The spelling of 100221123221 in words is "one hundred billion, two hundred twenty-one million, one hundred twenty-three thousand, two hundred twenty-one".