221112100221 has 8 divisors (see below), whose sum is σ = 310332772320. Its totient is φ = 139649747472.

The previous prime is 221112100219. The next prime is 221112100241. The reversal of 221112100221 is 122001211122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 221112100221 - 2¹ = 221112100219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221112100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112100241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1939579770 + ... + 1939579883.

It is an arithmetic number, because the mean of its divisors is an integer number (38791596540).

Almost surely, 2^221112100221 is an apocalyptic number.

It is an amenable number.

221112100221 is a deficient number, since it is larger than the sum of its proper divisors (89220672099).

221112100221 is a wasteful number, since it uses less digits than its factorization.

221112100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3879159675.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221112100221 its reverse (122001211122), we get a palindrome (343113311343).

The spelling of 221112100221 in words is "two hundred twenty-one billion, one hundred twelve million, one hundred thousand, two hundred twenty-one".