11311223312 has 20 divisors (see below), whose sum is σ = 21924192000. Its totient is φ = 5653367328.

The previous prime is 11311223293. The next prime is 11311223347. The reversal of 11311223312 is 21332211311.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98312 + ... + 179687.

It is an arithmetic number, because the mean of its divisors is an integer number (1096209600).

Almost surely, 2^11311223312 is an apocalyptic number.

It is an amenable number.

11311223312 is a deficient number, since it is larger than the sum of its proper divisors (10612968688).

11311223312 is a wasteful number, since it uses less digits than its factorization.

11311223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280550 (or 280544 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

Adding to 11311223312 its reverse (21332211311), we get a palindrome (32643434623).

The spelling of 11311223312 in words is "eleven billion, three hundred eleven million, two hundred twenty-three thousand, three hundred twelve".