1031312220313 has 16 divisors (see below), whose sum is σ = 1058953407120. Its totient is φ = 1003792204800.

The previous prime is 1031312220307. The next prime is 1031312220329. The reversal of 1031312220313 is 3130222131301.

It can be written as a sum of positive squares in 8 ways, for example, as 561604856409 + 469707363904 = 749403^2 + 685352^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031312220313 - 2⁹ = 1031312219801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031312220613) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31872523 + ... + 31904863.

It is an arithmetic number, because the mean of its divisors is an integer number (66184587945).

Almost surely, 2^{1031312220313} is an apocalyptic number.

It is an amenable number.

1031312220313 is a deficient number, since it is larger than the sum of its proper divisors (27641186807).

1031312220313 is a wasteful number, since it uses less digits than its factorization.

1031312220313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34188.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1031312220313 its reverse (3130222131301), we get a palindrome (4161534351614).

The spelling of 1031312220313 in words is "one trillion, thirty-one billion, three hundred twelve million, two hundred twenty thousand, three hundred thirteen".