12221020121222 has 32 divisors (see below), whose sum is σ = 20424266328960. Its totient is φ = 5437419161920.

The previous prime is 12221020121209. The next prime is 12221020121227. The reversal of 12221020121222 is 22212102012221.

It is a junction number, because it is equal to n+sod(n) for n = 12221020121194 and 12221020121203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221020121227) 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 in 15 ways as a sum of consecutive naturals, for example, 19902008 + ... + 20506875.

It is an arithmetic number, because the mean of its divisors is an integer number (638258322780).

Almost surely, 2^{12221020121222} is an apocalyptic number.

12221020121222 is a deficient number, since it is larger than the sum of its proper divisors (8203246207738).

12221020121222 is a wasteful number, since it uses less digits than its factorization.

12221020121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40409188.

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 12221020121222 its reverse (22212102012221), we get a palindrome (34433122133443).

The spelling of 12221020121222 in words is "twelve trillion, two hundred twenty-one billion, twenty million, one hundred twenty-one thousand, two hundred twenty-two".