12001222 has 4 divisors (see below), whose sum is σ = 18001836. Its totient is φ = 6000610.

The previous prime is 12001211. The next prime is 12001261. The reversal of 12001222 is 22210021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22210021 = 53 ⋅419057.

It is a junction number, because it is equal to n+sod(n) for n = 12001199 and 12001208.

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, 3000304 + ... + 3000307.

It is an arithmetic number, because the mean of its divisors is an integer number (4500459).

Almost surely, 2^12001222 is an apocalyptic number.

12001222 is a deficient number, since it is larger than the sum of its proper divisors (6000614).

12001222 is an equidigital number, since it uses as much as digits as its factorization.

12001222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6000613.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 12001222 is about 3464.2779911549. The cubic root of 12001222 is about 228.9506195847.

Adding to 12001222 its reverse (22210021), we get a palindrome (34211243).

The spelling of 12001222 in words is "twelve million, one thousand, two hundred twenty-two".