221232023320 has 128 divisors (see below), whose sum is σ = 624765312000. Its totient is φ = 68492505600.

The previous prime is 221232023317. The next prime is 221232023333. The reversal of 221232023320 is 23320232122.

It is a super-2 number, since 2×221232023320² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 221232023291 and 221232023300.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 217885 + ... + 699955.

It is an arithmetic number, because the mean of its divisors is an integer number (4880979000).

Almost surely, 2^221232023320 is an apocalyptic number.

221232023320 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 221232023320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312382656000).

221232023320 is an abundant number, since it is smaller than the sum of its proper divisors (403533288680).

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

221232023320 is a wasteful number, since it uses less digits than its factorization.

221232023320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482249 (or 482245 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 221232023320 its reverse (23320232122), we get a palindrome (244552255442).

The spelling of 221232023320 in words is "two hundred twenty-one billion, two hundred thirty-two million, twenty-three thousand, three hundred twenty".