221224131330 has 16 divisors (see below), whose sum is σ = 530937915264. Its totient is φ = 58993101680.

The previous prime is 221224131319. The next prime is 221224131379. The reversal of 221224131330 is 33131422122.

It is a self number, because there is not a number n which added to its sum of digits gives 221224131330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3687068826 + ... + 3687068885.

It is an arithmetic number, because the mean of its divisors is an integer number (33183619704).

Almost surely, 2^221224131330 is an apocalyptic number.

221224131330 is an abundant number, since it is smaller than the sum of its proper divisors (309713783934).

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

221224131330 is a wasteful number, since it uses less digits than its factorization.

221224131330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7374137721.

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 221224131330 its reverse (33131422122), we get a palindrome (254355553452).

The spelling of 221224131330 in words is "two hundred twenty-one billion, two hundred twenty-four million, one hundred thirty-one thousand, three hundred thirty".