1312131012 has 12 divisors (see below), whose sum is σ = 3061639056. Its totient is φ = 437377000.

The previous prime is 1312131011. The next prime is 1312131047. The reversal of 1312131012 is 2101312131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 1312130982 and 1312131000.

It is not an unprimeable number, because it can be changed into a prime (1312131011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54672114 + ... + 54672137.

It is an arithmetic number, because the mean of its divisors is an integer number (255136588).

Almost surely, 2^1312131012 is an apocalyptic number.

1312131012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1312131012 is an abundant number, since it is smaller than the sum of its proper divisors (1749508044).

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

1312131012 is a wasteful number, since it uses less digits than its factorization.

1312131012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109344258 (or 109344256 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1312131012 is about 36223.3489892914. The cubic root of 1312131012 is about 1094.7771728152. Note that the first 3 decimals are identical.

Adding to 1312131012 its reverse (2101312131), we get a palindrome (3413443143).

The spelling of 1312131012 in words is "one billion, three hundred twelve million, one hundred thirty-one thousand, twelve".