221110110210120 has 256 divisors, whose sum is σ = 682125760512000. Its totient is φ = 57303135590400.

The previous prime is 221110110210109. The next prime is 221110110210181. The reversal of 221110110210120 is 21012011011122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221110110210120.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 13385191221 + ... + 13385207739.

It is an arithmetic number, because the mean of its divisors is an integer number (2664553752000).

Almost surely, 2^{221110110210120} is an apocalyptic number.

221110110210120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221110110210120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (341062880256000).

221110110210120 is an abundant number, since it is smaller than the sum of its proper divisors (461015650301880).

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

221110110210120 is a wasteful number, since it uses less digits than its factorization.

221110110210120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26884 (or 26880 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 221110110210120 its reverse (21012011011122), we get a palindrome (242122121221242).

The spelling of 221110110210120 in words is "two hundred twenty-one trillion, one hundred ten billion, one hundred ten million, two hundred ten thousand, one hundred twenty".