221030021232 has 60 divisors (see below), whose sum is σ = 626029842984. Its totient is φ = 72788999040.

The previous prime is 221030021153. The next prime is 221030021237. The reversal of 221030021232 is 232120030122.

221030021232 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221030021237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9234619 + ... + 9258522.

Almost surely, 2^221030021232 is an apocalyptic number.

It is an amenable number.

221030021232 is an abundant number, since it is smaller than the sum of its proper divisors (404999821752).

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

221030021232 is a wasteful number, since it uses less digits than its factorization.

221030021232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18493238 (or 18493229 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 221030021232 its reverse (232120030122), we get a palindrome (453150051354).

The spelling of 221030021232 in words is "two hundred twenty-one billion, thirty million, twenty-one thousand, two hundred thirty-two".