1222123312 has 10 divisors (see below), whose sum is σ = 2367863948. Its totient is φ = 611061648.

The previous prime is 1222123303. The next prime is 1222123313. The reversal of 1222123312 is 2133212221.

It is a self number, because there is not a number n which added to its sum of digits gives 1222123312.

It is not an unprimeable number, because it can be changed into a prime (1222123313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38191338 + ... + 38191369.

Almost surely, 2^1222123312 is an apocalyptic number.

It is an amenable number.

1222123312 is a deficient number, since it is larger than the sum of its proper divisors (1145740636).

1222123312 is an equidigital number, since it uses as much as digits as its factorization.

1222123312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76382715 (or 76382709 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 1222123312 is about 34958.8803024353. The cubic root of 1222123312 is about 1069.1492675903.

Adding to 1222123312 its reverse (2133212221), we get a palindrome (3355335533).

The spelling of 1222123312 in words is "one billion, two hundred twenty-two million, one hundred twenty-three thousand, three hundred twelve".