221120211121110 has 128 divisors (see below), whose sum is σ = 682009326351360. Its totient is φ = 49932825608448.

The previous prime is 221120211121099. The next prime is 221120211121171. The reversal of 221120211121110 is 11121112021122.

It is a happy number.

221120211121110 is a `hidden beast` number, since 2 + 211 + 20 + 211 + 1 + 211 + 10 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 704631207 + ... + 704944946.

It is an arithmetic number, because the mean of its divisors is an integer number (5328197862120).

Almost surely, 2^{221120211121110} is an apocalyptic number.

221120211121110 is an abundant number, since it is smaller than the sum of its proper divisors (460889115230250).

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

221120211121110 is a wasteful number, since it uses less digits than its factorization.

221120211121110 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1409576259 (or 1409576253 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 221120211121110 its reverse (11121112021122), we get a palindrome (232241323142232).

The spelling of 221120211121110 in words is "two hundred twenty-one trillion, one hundred twenty billion, two hundred eleven million, one hundred twenty-one thousand, one hundred ten".