1312123112 has 32 divisors (see below), whose sum is σ = 2546181120. Its totient is φ = 633251520.

The previous prime is 1312123093. The next prime is 1312123139. The reversal of 1312123112 is 2113212131.

It is a super-2 number, since 2×1312123112² = 3443334122089129088, which contains 22 as substring.

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, 91793 + ... + 105119.

It is an arithmetic number, because the mean of its divisors is an integer number (79568160).

Almost surely, 2^1312123112 is an apocalyptic number.

It is an amenable number.

1312123112 is a deficient number, since it is larger than the sum of its proper divisors (1234058008).

1312123112 is a wasteful number, since it uses less digits than its factorization.

1312123112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13761 (or 13757 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1312123112 is about 36223.2399434396. The cubic root of 1312123112 is about 1094.7749756878.

Adding to 1312123112 its reverse (2113212131), we get a palindrome (3425335243).

The spelling of 1312123112 in words is "one billion, three hundred twelve million, one hundred twenty-three thousand, one hundred twelve".