221310234500 has 96 divisors (see below), whose sum is σ = 486897290880. Its totient is φ = 87874243200.

The previous prime is 221310234401. The next prime is 221310234521. The reversal of 221310234500 is 5432013122.

221310234500 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 132599666 + ... + 132601334.

It is an arithmetic number, because the mean of its divisors is an integer number (5071846780).

Almost surely, 2^221310234500 is an apocalyptic number.

221310234500 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 221310234500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243448645440).

221310234500 is an abundant number, since it is smaller than the sum of its proper divisors (265587056380).

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

221310234500 is a wasteful number, since it uses less digits than its factorization.

221310234500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3478 (or 3466 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 221310234500 its reverse (5432013122), we get a palindrome (226742247622).

The spelling of 221310234500 in words is "two hundred twenty-one billion, three hundred ten million, two hundred thirty-four thousand, five hundred".