221331322320 has 40 divisors (see below), whose sum is σ = 686127099936. Its totient is φ = 59021685888.

The previous prime is 221331322319. The next prime is 221331322339. The reversal of 221331322320 is 23223133122.

221331322320 is digitally balanced in base 7, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 461106682 + ... + 461107161.

Almost surely, 2^221331322320 is an apocalyptic number.

221331322320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221331322320 is an abundant number, since it is smaller than the sum of its proper divisors (464795777616).

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

221331322320 is a wasteful number, since it uses less digits than its factorization.

221331322320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 922213859 (or 922213853 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 24.

Adding to 221331322320 its reverse (23223133122), we get a palindrome (244554455442).

The spelling of 221331322320 in words is "two hundred twenty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, three hundred twenty".