221321000423200 has 144 divisors (see below), whose sum is σ = 540574498892736. Its totient is φ = 88483419878400.

The previous prime is 221321000423183. The next prime is 221321000423209. The reversal of 221321000423200 is 2324000123122.

It is not an unprimeable number, because it can be changed into a prime (221321000423209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17316400810 + ... + 17316413590.

It is an arithmetic number, because the mean of its divisors is an integer number (3753989575644).

Almost surely, 2^{221321000423200} is an apocalyptic number.

221321000423200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221321000423200 is an abundant number, since it is smaller than the sum of its proper divisors (319253498469536).

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

221321000423200 is a wasteful number, since it uses less digits than its factorization.

221321000423200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22107 (or 22094 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 221321000423200 its reverse (2324000123122), we get a palindrome (223645000546322).

The spelling of 221321000423200 in words is "two hundred twenty-one trillion, three hundred twenty-one billion, four hundred twenty-three thousand, two hundred".