22221201221122 has 4 divisors (see below), whose sum is σ = 33331801831686. Its totient is φ = 11110600610560.

The previous prime is 22221201221099. The next prime is 22221201221129. The reversal of 22221201221122 is 22112210212222.

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., 20109762640881 + 2111438580241 = 4484391^2 + 1453079^2 .

It is a junction number, because it is equal to n+sod(n) for n = 22221201221093 and 22221201221102.

It is not an unprimeable number, because it can be changed into a prime (22221201221129) by changing a digit.

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, 5555300305279 + ... + 5555300305282.

Almost surely, 2^{22221201221122} is an apocalyptic number.

22221201221122 is a deficient number, since it is larger than the sum of its proper divisors (11110600610564).

22221201221122 is a wasteful number, since it uses less digits than its factorization.

22221201221122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11110600610563.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 22221201221122 its reverse (22112210212222), we get a palindrome (44333411433344).

The spelling of 22221201221122 in words is "twenty-two trillion, two hundred twenty-one billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-two".