1221222233312 has 24 divisors (see below), whose sum is σ = 2411544982392. Its totient is φ = 608766364800.

The previous prime is 1221222233299. The next prime is 1221222233333. The reversal of 1221222233312 is 2133322221221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57637739 + ... + 57658922.

It is an arithmetic number, because the mean of its divisors is an integer number (100481040933).

Almost surely, 2^{1221222233312} is an apocalyptic number.

It is an amenable number.

1221222233312 is a deficient number, since it is larger than the sum of its proper divisors (1190322749080).

1221222233312 is a wasteful number, since it uses less digits than its factorization.

1221222233312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115297002 (or 115296994 counting only the distinct ones).

The product of its digits is 3456, while the sum is 26.

Adding to 1221222233312 its reverse (2133322221221), we get a palindrome (3354544454533).

The spelling of 1221222233312 in words is "one trillion, two hundred twenty-one billion, two hundred twenty-two million, two hundred thirty-three thousand, three hundred twelve".