221100111020110 has 128 divisors (see below), whose sum is σ = 470807576838144. Its totient is φ = 73157188798080.

The previous prime is 221100111020101. The next prime is 221100111020123. The reversal of 221100111020110 is 11020111001122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6352156327 + ... + 6352191133.

It is an arithmetic number, because the mean of its divisors is an integer number (3678184194048).

Almost surely, 2^{221100111020110} is an apocalyptic number.

221100111020110 is an abundant number, since it is smaller than the sum of its proper divisors (249707465818034).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221100111020110 is a wasteful number, since it uses less digits than its factorization.

221100111020110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42878.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 221100111020110 its reverse (11020111001122), we get a palindrome (232120222021232).

The spelling of 221100111020110 in words is "two hundred twenty-one trillion, one hundred billion, one hundred eleven million, twenty thousand, one hundred ten".