12111223312 has 20 divisors (see below), whose sum is σ = 23518960960. Its totient is φ = 6041814048.

The previous prime is 12111223297. The next prime is 12111223349. The reversal of 12111223312 is 21332211121.

It is a super-2 number, since 2×12111223312² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12111223312.

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, 855108 + ... + 869155.

It is an arithmetic number, because the mean of its divisors is an integer number (1175948048).

Almost surely, 2^12111223312 is an apocalyptic number.

It is an amenable number.

12111223312 is a deficient number, since it is larger than the sum of its proper divisors (11407737648).

12111223312 is a wasteful number, since it uses less digits than its factorization.

12111223312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1724710 (or 1724704 counting only the distinct ones).

The product of its digits is 144, while the sum is 19.

Adding to 12111223312 its reverse (21332211121), we get a palindrome (33443434433).

The spelling of 12111223312 in words is "twelve billion, one hundred eleven million, two hundred twenty-three thousand, three hundred twelve".