221111000112221 has 8 divisors (see below), whose sum is σ = 229278832138200. Its totient is φ = 212979389071680.

The previous prime is 221111000112217. The next prime is 221111000112263. The reversal of 221111000112221 is 122211000111122.

221111000112221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6440738455321 + 214670261656900 = 2537861^2 + 14651630^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 221111000112221 - 2² = 221111000112217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221111000112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221111000112281) 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, 9055233926 + ... + 9055258343.

It is an arithmetic number, because the mean of its divisors is an integer number (28659854017275).

Almost surely, 2^{221111000112221} is an apocalyptic number.

It is an amenable number.

221111000112221 is a deficient number, since it is larger than the sum of its proper divisors (8167832025979).

221111000112221 is a wasteful number, since it uses less digits than its factorization.

221111000112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18110492719.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 221111000112221 its reverse (122211000111122), we get a palindrome (343322000223343).

The spelling of 221111000112221 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred twelve thousand, two hundred twenty-one".