221120120220 has 48 divisors (see below), whose sum is σ = 630818163360. Its totient is φ = 57852810496.

The previous prime is 221120120203. The next prime is 221120120231. The reversal of 221120120220 is 22021021122.

221120120220 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×221120120220² (a number of 23 digits) contains 22 as substring.

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 221120120220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34764135 + ... + 34770494.

It is an arithmetic number, because the mean of its divisors is an integer number (13142045070).

Almost surely, 2^221120120220 is an apocalyptic number.

221120120220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221120120220 is an abundant number, since it is smaller than the sum of its proper divisors (409698043140).

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

221120120220 is a wasteful number, since it uses less digits than its factorization.

221120120220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69534694 (or 69534692 counting only the distinct ones).

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

Adding to 221120120220 its reverse (22021021122), we get a palindrome (243141141342).

The spelling of 221120120220 in words is "two hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand, two hundred twenty".