1311252261113 has 8 divisors (see below), whose sum is σ = 1339181458560. Its totient is φ = 1283324322640.

The previous prime is 1311252261083. The next prime is 1311252261139. The reversal of 1311252261113 is 3111622521131.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1311252261113 - 2⁶ = 1311252261049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311252261173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1964378 + ... + 2545836.

It is an arithmetic number, because the mean of its divisors is an integer number (167397682320).

Almost surely, 2^{1311252261113} is an apocalyptic number.

It is an amenable number.

1311252261113 is a deficient number, since it is larger than the sum of its proper divisors (27929197447).

1311252261113 is an equidigital number, since it uses as much as digits as its factorization.

1311252261113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 629487.

The product of its digits is 2160, while the sum is 29.

Adding to 1311252261113 its reverse (3111622521131), we get a palindrome (4422874782244).

The spelling of 1311252261113 in words is "one trillion, three hundred eleven billion, two hundred fifty-two million, two hundred sixty-one thousand, one hundred thirteen".