221222042342 has 24 divisors (see below), whose sum is σ = 386040112920. Its totient is φ = 94802023680.

The previous prime is 221222042339. The next prime is 221222042369. The reversal of 221222042342 is 243240222122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1276742 + ... + 1439622.

It is an arithmetic number, because the mean of its divisors is an integer number (16085004705).

Almost surely, 2^221222042342 is an apocalyptic number.

221222042342 is a deficient number, since it is larger than the sum of its proper divisors (164818070578).

221222042342 is a wasteful number, since it uses less digits than its factorization.

221222042342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176756 (or 176749 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 221222042342 its reverse (243240222122), we get a palindrome (464462264464).

The spelling of 221222042342 in words is "two hundred twenty-one billion, two hundred twenty-two million, forty-two thousand, three hundred forty-two".