221222402320 has 40 divisors (see below), whose sum is σ = 514526103936. Its totient is φ = 88457301888.

The previous prime is 221222402287. The next prime is 221222402389. The reversal of 221222402320 is 23204222122.

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

It is a junction number, because it is equal to n+sod(n) for n = 221222402291 and 221222402300.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 269032 + ... + 717511.

Almost surely, 2^221222402320 is an apocalyptic number.

221222402320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222402320 is an abundant number, since it is smaller than the sum of its proper divisors (293303701616).

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

221222402320 is a wasteful number, since it uses less digits than its factorization.

221222402320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989359 (or 989353 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

Adding to 221222402320 its reverse (23204222122), we get a palindrome (244426624442).

The spelling of 221222402320 in words is "two hundred twenty-one billion, two hundred twenty-two million, four hundred two thousand, three hundred twenty".