221312220032 has 32 divisors (see below), whose sum is σ = 455117880000. Its totient is φ = 107086556160.

The previous prime is 221312220007. The next prime is 221312220067. The reversal of 221312220032 is 230022213122.

It is a happy number.

221312220032 is digitally balanced in base 2, 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 (32).

It is a junction number, because it is equal to n+sod(n) for n = 221312219986 and 221312220013.

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 3 ways as a sum of consecutive naturals, for example, 27883157 + ... + 27891092.

It is an arithmetic number, because the mean of its divisors is an integer number (14222433750).

Almost surely, 2^221312220032 is an apocalyptic number.

It is an amenable number.

221312220032 is an abundant number, since it is smaller than the sum of its proper divisors (233805659968).

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

221312220032 is an equidigital number, since it uses as much as digits as its factorization.

221312220032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55774294 (or 55774282 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 221312220032 its reverse (230022213122), we get a palindrome (451334433154).

The spelling of 221312220032 in words is "two hundred twenty-one billion, three hundred twelve million, two hundred twenty thousand, thirty-two".