12221212200122 has 4 divisors (see below), whose sum is σ = 18331818300186. Its totient is φ = 6110606100060.

The previous prime is 12221212200059. The next prime is 12221212200137. The reversal of 12221212200122 is 22100221212221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 9281533926721 + 2939678273401 = 3046561^2 + 1714549^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12221212200094 and 12221212200103.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055303050029 + ... + 3055303050032.

Almost surely, 2^{12221212200122} is an apocalyptic number.

12221212200122 is a deficient number, since it is larger than the sum of its proper divisors (6110606100064).

12221212200122 is an equidigital number, since it uses as much as digits as its factorization.

12221212200122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6110606100063.

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

Adding to 12221212200122 its reverse (22100221212221), we get a palindrome (34321433412343).

It can be divided in two parts, 1222121 and 2200122, that added together give a palindrome (3422243).

The spelling of 12221212200122 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, two hundred thousand, one hundred twenty-two".