221100222111 has 8 divisors (see below), whose sum is σ = 294804850944. Its totient is φ = 147397870680.

The previous prime is 221100222107. The next prime is 221100222121. The reversal of 221100222111 is 111222001122.

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

It is not a de Polignac number, because 221100222111 - 2² = 221100222107 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221100222121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 328231 + ... + 741576.

It is an arithmetic number, because the mean of its divisors is an integer number (36850606368).

Almost surely, 2^221100222111 is an apocalyptic number.

221100222111 is a deficient number, since it is larger than the sum of its proper divisors (73704628833).

221100222111 is a wasteful number, since it uses less digits than its factorization.

221100222111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138701.

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

Adding to 221100222111 its reverse (111222001122), we get a palindrome (332322223233).

It can be divided in two parts, 221100 and 222111, that added together give a triangular number (443211 = T₉₄₁).

The spelling of 221100222111 in words is "two hundred twenty-one billion, one hundred million, two hundred twenty-two thousand, one hundred eleven".