221223144300 has 108 divisors (see below), whose sum is σ = 657840317400. Its totient is φ = 57398330880.

The previous prime is 221223144283. The next prime is 221223144301. The reversal of 221223144300 is 3441322122.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (221223144301) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 141376 + ... + 680024.

It is an arithmetic number, because the mean of its divisors is an integer number (6091114050).

Almost surely, 2^221223144300 is an apocalyptic number.

221223144300 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 221223144300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (328920158700).

221223144300 is an abundant number, since it is smaller than the sum of its proper divisors (436617173100).

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

221223144300 is a wasteful number, since it uses less digits than its factorization.

221223144300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 538740 (or 538696 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221223144300 its reverse (3441322122), we get a palindrome (224664466422).

The spelling of 221223144300 in words is "two hundred twenty-one billion, two hundred twenty-three million, one hundred forty-four thousand, three hundred".