221222111324 has 24 divisors (see below), whose sum is σ = 409965771600. Its totient is φ = 104090754816.

The previous prime is 221222111293. The next prime is 221222111347. The reversal of 221222111324 is 423111222122.

It is a self number, because there is not a number n which added to its sum of digits gives 221222111324.

It is a congruent number.

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, 312254 + ... + 734810.

It is an arithmetic number, because the mean of its divisors is an integer number (17081907150).

Almost surely, 2^221222111324 is an apocalyptic number.

It is an amenable number.

221222111324 is a deficient number, since it is larger than the sum of its proper divisors (188743660276).

221222111324 is a wasteful number, since it uses less digits than its factorization.

221222111324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430277 (or 430275 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

Adding to 221222111324 its reverse (423111222122), we get a palindrome (644333333446).

The spelling of 221222111324 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred eleven thousand, three hundred twenty-four".