221111111011102 has 32 divisors (see below), whose sum is σ = 361002432843360. Its totient is φ = 100960616899200.

The previous prime is 221111111011079. The next prime is 221111111011163. The reversal of 221111111011102 is 201110111111122.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 30133393 + ... + 36745660.

It is an arithmetic number, because the mean of its divisors is an integer number (11281326026355).

Almost surely, 2^{221111111011102} is an apocalyptic number.

221111111011102 is a deficient number, since it is larger than the sum of its proper divisors (139891321832258).

221111111011102 is a wasteful number, since it uses less digits than its factorization.

221111111011102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66880428.

The product of its (nonzero) digits is 8, while the sum is 16.

Adding to 221111111011102 its reverse (201110111111122), we get a palindrome (422221222122224).

The spelling of 221111111011102 in words is "two hundred twenty-one trillion, one hundred eleven billion, one hundred eleven million, eleven thousand, one hundred two".