221323200000 has 720 divisors, whose sum is σ = 858210102288. Its totient is φ = 50534400000.

The previous prime is 221323199983. The next prime is 221323200011. The reversal of 221323200000 is 2323122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 235199530 + ... + 235200470.

Almost surely, 2^221323200000 is an apocalyptic number.

221323200000 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 221323200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (429105051144).

221323200000 is an abundant number, since it is smaller than the sum of its proper divisors (636886902288).

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

221323200000 is an frugal number, since it uses more digits than its factorization.

221323200000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 221323200000 its reverse (2323122), we get a palindrome (221325523122).

The spelling of 221323200000 in words is "two hundred twenty-one billion, three hundred twenty-three million, two hundred thousand".