221232321320120 has 64 divisors (see below), whose sum is σ = 544589702006400. Its totient is φ = 80216277834880.

The previous prime is 221232321320099. The next prime is 221232321320209. The reversal of 221232321320120 is 21023123232122.

It is a self number, because there is not a number n which added to its sum of digits gives 221232321320120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 724344050 + ... + 724649409.

It is an arithmetic number, because the mean of its divisors is an integer number (8509214093850).

Almost surely, 2^{221232321320120} is an apocalyptic number.

221232321320120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221232321320120 is an abundant number, since it is smaller than the sum of its proper divisors (323357380686280).

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

221232321320120 is a wasteful number, since it uses less digits than its factorization.

221232321320120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1448993828 (or 1448993824 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 221232321320120 its reverse (21023123232122), we get a palindrome (242255444552242).

The spelling of 221232321320120 in words is "two hundred twenty-one trillion, two hundred thirty-two billion, three hundred twenty-one million, three hundred twenty thousand, one hundred twenty".