221222334320 has 40 divisors (see below), whose sum is σ = 553906693536. Its totient is φ = 81682092288.

The previous prime is 221222334283. The next prime is 221222334343. The reversal of 221222334320 is 23433222122.

It is a happy number.

221222334320 is digitally balanced in base 2 and base 3, because in such bases 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 (26).

It is a self number, because there is not a number n which added to its sum of digits gives 221222334320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106355852 + ... + 106357931.

Almost surely, 2^221222334320 is an apocalyptic number.

221222334320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221222334320 is an abundant number, since it is smaller than the sum of its proper divisors (332684359216).

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

221222334320 is a wasteful number, since it uses less digits than its factorization.

221222334320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212713809 (or 212713803 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 221222334320 its reverse (23433222122), we get a palindrome (244655556442).

The spelling of 221222334320 in words is "two hundred twenty-one billion, two hundred twenty-two million, three hundred thirty-four thousand, three hundred twenty".