1311223312 has 40 divisors (see below), whose sum is σ = 2911299776. Its totient is φ = 560428416.

The previous prime is 1311223289. The next prime is 1311223321. The reversal of 1311223312 is 2133221131.

It is a self number, because there is not a number n which added to its sum of digits gives 1311223312.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26083 + ... + 57469.

Almost surely, 2^1311223312 is an apocalyptic number.

It is an amenable number.

1311223312 is an abundant number, since it is smaller than the sum of its proper divisors (1600076464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311223312 is a wasteful number, since it uses less digits than its factorization.

1311223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31775 (or 31769 counting only the distinct ones).

The product of its digits is 216, while the sum is 19.

The square root of 1311223312 is about 36210.8176102115. The cubic root of 1311223312 is about 1094.5246679295.

Adding to 1311223312 its reverse (2133221131), we get a palindrome (3444444443).

The spelling of 1311223312 in words is "one billion, three hundred eleven million, two hundred twenty-three thousand, three hundred twelve".