221221214342 has 16 divisors (see below), whose sum is σ = 332848590720. Its totient is φ = 110272200768.

The previous prime is 221221214317. The next prime is 221221214359. The reversal of 221221214342 is 243412122122.

It is a happy number.

221221214342 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 732218 + ... + 989234.

It is an arithmetic number, because the mean of its divisors is an integer number (20803036920).

Almost surely, 2^221221214342 is an apocalyptic number.

221221214342 is a deficient number, since it is larger than the sum of its proper divisors (111627376378).

221221214342 is a wasteful number, since it uses less digits than its factorization.

221221214342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 258335.

The product of its digits is 3072, while the sum is 26.

Adding to 221221214342 its reverse (243412122122), we get a palindrome (464633336464).

The spelling of 221221214342 in words is "two hundred twenty-one billion, two hundred twenty-one million, two hundred fourteen thousand, three hundred forty-two".