221331221324 has 6 divisors (see below), whose sum is σ = 387329637324. Its totient is φ = 110665610660.

The previous prime is 221331221323. The next prime is 221331221341. The reversal of 221331221324 is 423122133122.

221331221324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 221331221293 and 221331221302.

It is not an unprimeable number, because it can be changed into a prime (221331221323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27666402662 + ... + 27666402669.

It is an arithmetic number, because the mean of its divisors is an integer number (64554939554).

Almost surely, 2^221331221324 is an apocalyptic number.

It is an amenable number.

221331221324 is a deficient number, since it is larger than the sum of its proper divisors (165998416000).

221331221324 is a wasteful number, since it uses less digits than its factorization.

221331221324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55332805335 (or 55332805333 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

Adding to 221331221324 its reverse (423122133122), we get a palindrome (644453354446).

The spelling of 221331221324 in words is "two hundred twenty-one billion, three hundred thirty-one million, two hundred twenty-one thousand, three hundred twenty-four".