22241221042 has 4 divisors (see below), whose sum is σ = 33361831566. Its totient is φ = 11120610520.

The previous prime is 22241221031. The next prime is 22241221049. The reversal of 22241221042 is 24012214222.

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., 14910607881 + 7330613161 = 122109^2 + 85619^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (22241221049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5560305259 + ... + 5560305262.

Almost surely, 2^22241221042 is an apocalyptic number.

22241221042 is a deficient number, since it is larger than the sum of its proper divisors (11120610524).

22241221042 is a wasteful number, since it uses less digits than its factorization.

22241221042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11120610523.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 22241221042 its reverse (24012214222), we get a palindrome (46253435264).

The spelling of 22241221042 in words is "twenty-two billion, two hundred forty-one million, two hundred twenty-one thousand, forty-two".