12001221211222 has 4 divisors (see below), whose sum is σ = 18001831816836. Its totient is φ = 6000610605610.

The previous prime is 12001221211159. The next prime is 12001221211241. The reversal of 12001221211222 is 22211212210021.

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

It is a self number, because there is not a number n which added to its sum of digits gives 12001221211222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3000305302804 + ... + 3000305302807.

It is an arithmetic number, because the mean of its divisors is an integer number (4500457954209).

Almost surely, 2^{12001221211222} is an apocalyptic number.

12001221211222 is a deficient number, since it is larger than the sum of its proper divisors (6000610605614).

12001221211222 is an equidigital number, since it uses as much as digits as its factorization.

12001221211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6000610605613.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 12001221211222 its reverse (22211212210021), we get a palindrome (34212433421243).

The spelling of 12001221211222 in words is "twelve trillion, one billion, two hundred twenty-one million, two hundred eleven thousand, two hundred twenty-two".