1312121312 has 48 divisors (see below), whose sum is σ = 2624493312. Its totient is φ = 645667200.

The previous prime is 1312121311. The next prime is 1312121339. The reversal of 1312121312 is 2131212131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312121311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 556937 + ... + 559287.

It is an arithmetic number, because the mean of its divisors is an integer number (54676944).

Almost surely, 2^1312121312 is an apocalyptic number.

It is an amenable number.

1312121312 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

1312121312 is a wasteful number, since it uses less digits than its factorization.

1312121312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631 (or 2623 counting only the distinct ones).

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

The square root of 1312121312 is about 36223.2150975034. The cubic root of 1312121312 is about 1094.7744750753.

Adding to 1312121312 its reverse (2131212131), we get a palindrome (3443333443).

It can be divided in two parts, 131212131 and 2, that multiplied together give a palindrome (262424262).

The spelling of 1312121312 in words is "one billion, three hundred twelve million, one hundred twenty-one thousand, three hundred twelve".