221323233320 has 128 divisors (see below), whose sum is σ = 581375232000. Its totient is φ = 75798148608.

The previous prime is 221323233317. The next prime is 221323233323. The reversal of 221323233320 is 23332323122.

It is an interprime number because it is at equal distance from previous prime (221323233317) and next prime (221323233323).

It is a self number, because there is not a number n which added to its sum of digits gives 221323233320.

It is not an unprimeable number, because it can be changed into a prime (221323233323) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13066697 + ... + 13083623.

It is an arithmetic number, because the mean of its divisors is an integer number (4541994000).

Almost surely, 2^221323233320 is an apocalyptic number.

221323233320 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 221323233320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290687616000).

221323233320 is an abundant number, since it is smaller than the sum of its proper divisors (360051998680).

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

221323233320 is a wasteful number, since it uses less digits than its factorization.

221323233320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17912 (or 17894 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 26.

Adding to 221323233320 its reverse (23332323122), we get a palindrome (244655556442).

The spelling of 221323233320 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred thirty-three thousand, three hundred twenty".