12221212220122 has 16 divisors (see below), whose sum is σ = 18923579251200. Its totient is φ = 5913361051920.

The previous prime is 12221212220101. The next prime is 12221212220167. The reversal of 12221212220122 is 22102221212221.

It is a junction number, because it is equal to n+sod(n) for n = 12221212220093 and 12221212220102.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756904 + ... + 5001532.

It is an arithmetic number, because the mean of its divisors is an integer number (1182723703200).

Almost surely, 2^{12221212220122} is an apocalyptic number.

12221212220122 is a deficient number, since it is larger than the sum of its proper divisors (6702367031078).

12221212220122 is a wasteful number, since it uses less digits than its factorization.

12221212220122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4291101.

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

Adding to 12221212220122 its reverse (22102221212221), we get a palindrome (34323433432343).

The spelling of 12221212220122 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, one hundred twenty-two".