12221221322 has 16 divisors (see below), whose sum is σ = 18478091520. Its totient is φ = 6062002608.

The previous prime is 12221221321. The next prime is 12221221333. The reversal of 12221221322 is 22312212221.

It is a junction number, because it is equal to n+sod(n) for n = 12221221294 and 12221221303.

It is not an unprimeable number, because it can be changed into a prime (12221221321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134063 + ... + 205949.

It is an arithmetic number, because the mean of its divisors is an integer number (1154880720).

Almost surely, 2^12221221322 is an apocalyptic number.

12221221322 is a deficient number, since it is larger than the sum of its proper divisors (6256870198).

12221221322 is a wasteful number, since it uses less digits than its factorization.

12221221322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72565.

The product of its digits is 384, while the sum is 20.

Adding to 12221221322 its reverse (22312212221), we get a palindrome (34533433543).

The spelling of 12221221322 in words is "twelve billion, two hundred twenty-one million, two hundred twenty-one thousand, three hundred twenty-two".