1312031021310 has 128 divisors (see below), whose sum is σ = 3508278220800. Its totient is φ = 348923393280.

The previous prime is 1312031021281. The next prime is 1312031021359. The reversal of 1312031021310 is 131201302131.

1312031021310 is a `hidden beast` number, since 1 + 3 + 1 + 20 + 310 + 21 + 310 = 666.

It is a super-2 number, since 2×1312031021310² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 171750471 + ... + 171758109.

It is an arithmetic number, because the mean of its divisors is an integer number (27408423600).

Almost surely, 2^{1312031021310} is an apocalyptic number.

1312031021310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312031021310, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1754139110400).

1312031021310 is an abundant number, since it is smaller than the sum of its proper divisors (2196247199490).

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

1312031021310 is a wasteful number, since it uses less digits than its factorization.

1312031021310 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9303 (or 9297 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 1312031021310 its reverse (131201302131), we get a palindrome (1443232323441).

The spelling of 1312031021310 in words is "one trillion, three hundred twelve billion, thirty-one million, twenty-one thousand, three hundred ten".