221232542242 has 16 divisors (see below), whose sum is σ = 333111505752. Its totient is φ = 110195804160.

The previous prime is 221232542191. The next prime is 221232542273. The reversal of 221232542242 is 242245232122.

It can be written as a sum of positive squares in 4 ways, for example, as 163815277081 + 57417265161 = 404741^2 + 239619^2 .

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, 930642 + ... + 1143922.

Almost surely, 2^221232542242 is an apocalyptic number.

221232542242 is a deficient number, since it is larger than the sum of its proper divisors (111878963510).

221232542242 is a wasteful number, since it uses less digits than its factorization.

221232542242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215253.

The product of its digits is 30720, while the sum is 31.

Adding to 221232542242 its reverse (242245232122), we get a palindrome (463477774364).

The spelling of 221232542242 in words is "two hundred twenty-one billion, two hundred thirty-two million, five hundred forty-two thousand, two hundred forty-two".