221313012032 has 28 divisors (see below), whose sum is σ = 501906296160. Its totient is φ = 94848433536.

The previous prime is 221313012023. The next prime is 221313012047. The reversal of 221313012032 is 230210313122.

221313012032 is digitally balanced in base 3, 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 (28).

It is a junction number, because it is equal to n+sod(n) for n = 221313011995 and 221313012013.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 247000682 + ... + 247001577.

Almost surely, 2^221313012032 is an apocalyptic number.

It is an amenable number.

221313012032 is an abundant number, since it is smaller than the sum of its proper divisors (280593284128).

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

221313012032 is an equidigital number, since it uses as much as digits as its factorization.

221313012032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494002278 (or 494002268 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 221313012032 its reverse (230210313122), we get a palindrome (451523325154).

The spelling of 221313012032 in words is "two hundred twenty-one billion, three hundred thirteen million, twelve thousand, thirty-two".