221222323430 has 16 divisors (see below), whose sum is σ = 398242432224. Its totient is φ = 88479540480.

The previous prime is 221222323429. The next prime is 221222323481. The reversal of 221222323430 is 34323222122.

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 221222323430.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1074251 + ... + 1263510.

It is an arithmetic number, because the mean of its divisors is an integer number (24890152014).

Almost surely, 2^221222323430 is an apocalyptic number.

221222323430 is a deficient number, since it is larger than the sum of its proper divisors (177020108794).

221222323430 is a wasteful number, since it uses less digits than its factorization.

221222323430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2347231.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 221222323430 its reverse (34323222122), we get a palindrome (255545545552).

The spelling of 221222323430 in words is "two hundred twenty-one billion, two hundred twenty-two million, three hundred twenty-three thousand, four hundred thirty".