1312013443240 has 32 divisors (see below), whose sum is σ = 2952664557480. Its totient is φ = 524692611072.

The previous prime is 1312013443229. The next prime is 1312013443271. The reversal of 1312013443240 is 423443102131.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1154932803684 + 157080639556 = 1074678^2 + 396334^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1312013443199 and 1312013443208.

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, 3335337 + ... + 3707896.

Almost surely, 2^{1312013443240} is an apocalyptic number.

1312013443240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1312013443240 is an abundant number, since it is smaller than the sum of its proper divisors (1640651114240).

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

1312013443240 is a wasteful number, since it uses less digits than its factorization.

1312013443240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7047901 (or 7047897 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 1312013443240 its reverse (423443102131), we get a palindrome (1735456545371).

The spelling of 1312013443240 in words is "one trillion, three hundred twelve billion, thirteen million, four hundred forty-three thousand, two hundred forty".