12222212121222 has 16 divisors (see below), whose sum is σ = 24453303470640. Its totient is φ = 4072590835712.

The previous prime is 12222212121193. The next prime is 12222212121283. The reversal of 12222212121222 is 22212121222221.

It is a happy number.

It is a super-2 number, since 2×12222212121222² (a number of 27 digits) contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 12222212121192 and 12222212121201.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369949947 + ... + 369982982.

It is an arithmetic number, because the mean of its divisors is an integer number (1528331466915).

Almost surely, 2^{12222212121222} is an apocalyptic number.

12222212121222 is an abundant number, since it is smaller than the sum of its proper divisors (12231091349418).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12222212121222 is a wasteful number, since it uses less digits than its factorization.

12222212121222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739935687.

The product of its digits is 1024, while the sum is 24.

Adding to 12222212121222 its reverse (22212121222221), we get a palindrome (34434333343443).

The spelling of 12222212121222 in words is "twelve trillion, two hundred twenty-two billion, two hundred twelve million, one hundred twenty-one thousand, two hundred twenty-two".