221120220120 has 32 divisors (see below), whose sum is σ = 663360660720. Its totient is φ = 58965392000.

The previous prime is 221120220047. The next prime is 221120220151. The reversal of 221120220120 is 21022021122.

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 221120220120.

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 7 ways as a sum of consecutive naturals, for example, 921334131 + ... + 921334370.

Almost surely, 2^221120220120 is an apocalyptic number.

221120220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120220120 is an abundant number, since it is smaller than the sum of its proper divisors (442240440600).

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

221120220120 is a wasteful number, since it uses less digits than its factorization.

221120220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1842668515 (or 1842668511 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221120220120 its reverse (21022021122), we get a palindrome (242142241242).

It can be divided in two parts, 2211202 and 20120, that added together give a palindrome (2231322).

The spelling of 221120220120 in words is "two hundred twenty-one billion, one hundred twenty million, two hundred twenty thousand, one hundred twenty".