1313012200121 has 4 divisors (see below), whose sum is σ = 1313018513700. Its totient is φ = 1313005886544.

The previous prime is 1313012200079. The next prime is 1313012200237. The reversal of 1313012200121 is 1210022103131.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 576633684496 + 736378515625 = 759364^2 + 858125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313012200121 - 2¹⁰ = 1313012199097 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1313012200121.

It is not an unprimeable number, because it can be changed into a prime (1313012200021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2833826 + ... + 3264443.

It is an arithmetic number, because the mean of its divisors is an integer number (328254628425).

Almost surely, 2^{1313012200121} is an apocalyptic number.

It is an amenable number.

1313012200121 is a deficient number, since it is larger than the sum of its proper divisors (6313579).

1313012200121 is an equidigital number, since it uses as much as digits as its factorization.

1313012200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6313578.

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

Adding to 1313012200121 its reverse (1210022103131), we get a palindrome (2523034303252).

The spelling of 1313012200121 in words is "one trillion, three hundred thirteen billion, twelve million, two hundred thousand, one hundred twenty-one".