221103312111 has 48 divisors (see below), whose sum is σ = 369781251840. Its totient is φ = 125818133760.

The previous prime is 221103312103. The next prime is 221103312161. The reversal of 221103312111 is 111213301122.

221103312111 is a `hidden beast` number, since 221 + 1 + 0 + 331 + 2 + 111 = 666.

It is not a de Polignac number, because 221103312111 - 2³ = 221103312103 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221103312161) 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 47 ways as a sum of consecutive naturals, for example, 548406 + ... + 861948.

It is an arithmetic number, because the mean of its divisors is an integer number (7703776080).

Almost surely, 2^221103312111 is an apocalyptic number.

221103312111 is a deficient number, since it is larger than the sum of its proper divisors (148677939729).

221103312111 is a wasteful number, since it uses less digits than its factorization.

221103312111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313996 (or 313993 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 221103312111 its reverse (111213301122), we get a palindrome (332316613233).

The spelling of 221103312111 in words is "two hundred twenty-one billion, one hundred three million, three hundred twelve thousand, one hundred eleven".