12221212220222 has 4 divisors (see below), whose sum is σ = 18331818330336. Its totient is φ = 6110606110110.

The previous prime is 12221212220221. The next prime is 12221212220227. The reversal of 12221212220222 is 22202221212221.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12221212220221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3055303055054 + ... + 3055303055057.

It is an arithmetic number, because the mean of its divisors is an integer number (4582954582584).

Almost surely, 2^{12221212220222} is an apocalyptic number.

12221212220222 is a deficient number, since it is larger than the sum of its proper divisors (6110606110114).

12221212220222 is an equidigital number, since it uses as much as digits as its factorization.

12221212220222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6110606110113.

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 12221212220222 its reverse (22202221212221), we get a palindrome (34423433432443).

The spelling of 12221212220222 in words is "twelve trillion, two hundred twenty-one billion, two hundred twelve million, two hundred twenty thousand, two hundred twenty-two".