221222110042 has 4 divisors (see below), whose sum is σ = 331833165066. Its totient is φ = 110611055020.

The previous prime is 221222110013. The next prime is 221222110079. The reversal of 221222110042 is 240011222122.

221222110042 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 122331358081 + 98890751961 = 349759^2 + 314469^2 .

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 as a sum of consecutive naturals, namely, 55305527509 + ... + 55305527512.

Almost surely, 2^221222110042 is an apocalyptic number.

221222110042 is a deficient number, since it is larger than the sum of its proper divisors (110611055024).

221222110042 is a wasteful number, since it uses less digits than its factorization.

221222110042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110611055023.

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 221222110042 its reverse (240011222122), we get a palindrome (461233332164).

The spelling of 221222110042 in words is "two hundred twenty-one billion, two hundred twenty-two million, one hundred ten thousand, forty-two".