12221200121222 has 16 divisors (see below), whose sum is σ = 18346745652480. Its totient is φ = 6105618580872.

The previous prime is 12221200121197. The next prime is 12221200121239. The reversal of 12221200121222 is 22212100212221.

It is a junction number, because it is equal to n+sod(n) for n = 12221200121194 and 12221200121203.

It is a congruent number.

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, 90150263 + ... + 90285725.

It is an arithmetic number, because the mean of its divisors is an integer number (1146671603280).

Almost surely, 2^{12221200121222} is an apocalyptic number.

12221200121222 is a deficient number, since it is larger than the sum of its proper divisors (6125545531258).

12221200121222 is a wasteful number, since it uses less digits than its factorization.

12221200121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171907.

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

Adding to 12221200121222 its reverse (22212100212221), we get a palindrome (34433300333443).

Subtracting 12221200121222 from its reverse (22212100212221), we obtain a palindrome (9990900090999).

The spelling of 12221200121222 in words is "twelve trillion, two hundred twenty-one billion, two hundred million, one hundred twenty-one thousand, two hundred twenty-two".