220230021220 has 72 divisors (see below), whose sum is σ = 509181842232. Its totient is φ = 79952463360.

The previous prime is 220230021217. The next prime is 220230021229. The reversal of 220230021220 is 22120032022.

220230021220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1303354404 + 218926666816 = 36102^2 + 467896^2 .

It is a junction number, because it is equal to n+sod(n) for n = 220230021194 and 220230021203.

It is not an unprimeable number, because it can be changed into a prime (220230021229) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1409232 + ... + 1557688.

It is an arithmetic number, because the mean of its divisors is an integer number (7071970031).

Almost surely, 2^220230021220 is an apocalyptic number.

220230021220 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 220230021220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254590921116).

220230021220 is an abundant number, since it is smaller than the sum of its proper divisors (288951821012).

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

220230021220 is a wasteful number, since it uses less digits than its factorization.

220230021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149101 (or 149088 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

Adding to 220230021220 its reverse (22120032022), we get a palindrome (242350053242).

The spelling of 220230021220 in words is "two hundred twenty billion, two hundred thirty million, twenty-one thousand, two hundred twenty".