22122121066 has 4 divisors (see below), whose sum is σ = 33183181602. Its totient is φ = 11061060532.

The previous prime is 22122121009. The next prime is 22122121067. The reversal of 22122121066 is 66012122122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66012122122 = 2 ⋅33006061061.

It can be written as a sum of positive squares in only one way, i.e., 18619967025 + 3502154041 = 136455^2 + 59179^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22122121066.

It is not an unprimeable number, because it can be changed into a prime (22122121067) by changing a digit.

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 as a sum of consecutive naturals, namely, 5530530265 + ... + 5530530268.

Almost surely, 2^22122121066 is an apocalyptic number.

22122121066 is a deficient number, since it is larger than the sum of its proper divisors (11061060536).

22122121066 is a wasteful number, since it uses less digits than its factorization.

22122121066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11061060535.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 22122121066 its reverse (66012122122), we get a palindrome (88134243188).

The spelling of 22122121066 in words is "twenty-two billion, one hundred twenty-two million, one hundred twenty-one thousand, sixty-six".