221530020132 has 24 divisors (see below), whose sum is σ = 517120907296. Its totient is φ = 73812264768.

The previous prime is 221530020113. The next prime is 221530020181. The reversal of 221530020132 is 231020035122.

221530020132 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221530020099 and 221530020108.

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, 3854698 + ... + 3911745.

Almost surely, 2^221530020132 is an apocalyptic number.

It is an amenable number.

221530020132 is an abundant number, since it is smaller than the sum of its proper divisors (295590887164).

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

221530020132 is a wasteful number, since it uses less digits than its factorization.

221530020132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7768827 (or 7768825 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

Adding to 221530020132 its reverse (231020035122), we get a palindrome (452550055254).

The spelling of 221530020132 in words is "two hundred twenty-one billion, five hundred thirty million, twenty thousand, one hundred thirty-two".