1311253060501 has 4 divisors (see below), whose sum is σ = 1311633247500. Its totient is φ = 1310872873504.

The previous prime is 1311253060477. The next prime is 1311253060517. The reversal of 1311253060501 is 1050603521131.

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 165100818276 + 1146152242225 = 406326^2 + 1070585^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311253060501 - 2¹³ = 1311253052309 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 1311253060501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311253060561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190088326 + ... + 190095223.

It is an arithmetic number, because the mean of its divisors is an integer number (327908311875).

Almost surely, 2^{1311253060501} is an apocalyptic number.

It is an amenable number.

1311253060501 is a deficient number, since it is larger than the sum of its proper divisors (380186999).

1311253060501 is an equidigital number, since it uses as much as digits as its factorization.

1311253060501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380186998.

The product of its (nonzero) digits is 2700, while the sum is 28.

Adding to 1311253060501 its reverse (1050603521131), we get a palindrome (2361856581632).

The spelling of 1311253060501 in words is "one trillion, three hundred eleven billion, two hundred fifty-three million, sixty thousand, five hundred one".