1312131002 has 64 divisors (see below), whose sum is σ = 2538031104. Its totient is φ = 494493120.

The previous prime is 1312131001. The next prime is 1312131011. The reversal of 1312131002 is 2001312131.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1312131001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1385093 + ... + 1386039.

It is an arithmetic number, because the mean of its divisors is an integer number (39656736).

Almost surely, 2^1312131002 is an apocalyptic number.

1312131002 is a deficient number, since it is larger than the sum of its proper divisors (1225900102).

1312131002 is a wasteful number, since it uses less digits than its factorization.

1312131002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1323.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1312131002 is about 36223.3488512589. The cubic root of 1312131002 is about 1094.7771700341. Note that the first 3 decimals are identical.

Adding to 1312131002 its reverse (2001312131), we get a palindrome (3313443133).

The spelling of 1312131002 in words is "one billion, three hundred twelve million, one hundred thirty-one thousand, two".