221120012112210 has 64 divisors (see below), whose sum is σ = 589655680329600. Its totient is φ = 58965105093696.

The previous prime is 221120012112173. The next prime is 221120012112229. The reversal of 221120012112210 is 12211210021122.

221120012112210 is a `hidden beast` number, since 2 + 211 + 20 + 0 + 1 + 211 + 221 + 0 = 666.

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

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 73847736 + ... + 76783644.

It is an arithmetic number, because the mean of its divisors is an integer number (9213370005150).

Almost surely, 2^{221120012112210} is an apocalyptic number.

221120012112210 is an abundant number, since it is smaller than the sum of its proper divisors (368535668217390).

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

221120012112210 is a wasteful number, since it uses less digits than its factorization.

221120012112210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3214872 (or 3214866 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 221120012112210 its reverse (12211210021122), we get a palindrome (233331222133332).

The spelling of 221120012112210 in words is "two hundred twenty-one trillion, one hundred twenty billion, twelve million, one hundred twelve thousand, two hundred ten".