12313123112 has 8 divisors (see below), whose sum is σ = 23087105850. Its totient is φ = 6156561552.

The previous prime is 12313123073. The next prime is 12313123153. The reversal of 12313123112 is 21132131321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 11186446756 + 1126676356 = 105766^2 + 33566^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×12313123112² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 769570187 + ... + 769570202.

Almost surely, 2^12313123112 is an apocalyptic number.

It is an amenable number.

12313123112 is a deficient number, since it is larger than the sum of its proper divisors (10773982738).

12313123112 is a wasteful number, since it uses less digits than its factorization.

12313123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1539140395 (or 1539140391 counting only the distinct ones).

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

Adding to 12313123112 its reverse (21132131321), we get a palindrome (33445254433).

The spelling of 12313123112 in words is "twelve billion, three hundred thirteen million, one hundred twenty-three thousand, one hundred twelve".