221440232130 has 32 divisors (see below), whose sum is σ = 572337831744. Its totient is φ = 54508364736.

The previous prime is 221440232087. The next prime is 221440232131. The reversal of 221440232130 is 31232044122.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 221440232130.

It is not an unprimeable number, because it can be changed into a prime (221440232131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 283897344 + ... + 283898123.

It is an arithmetic number, because the mean of its divisors is an integer number (17885557242).

Almost surely, 2^221440232130 is an apocalyptic number.

221440232130 is an abundant number, since it is smaller than the sum of its proper divisors (350897599614).

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

221440232130 is a wasteful number, since it uses less digits than its factorization.

221440232130 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567795490.

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 221440232130 its reverse (31232044122), we get a palindrome (252672276252).

The spelling of 221440232130 in words is "two hundred twenty-one billion, four hundred forty million, two hundred thirty-two thousand, one hundred thirty".