1311242365421 has 16 divisors (see below), whose sum is σ = 1374386247936. Its totient is φ = 1248611650176.

The previous prime is 1311242365409. The next prime is 1311242365439. The reversal of 1311242365421 is 1245632421131.

It is a cyclic number.

It is not a de Polignac number, because 1311242365421 - 2¹⁴ = 1311242349037 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311242365621) 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 15 ways as a sum of consecutive naturals, for example, 32417816 + ... + 32458238.

It is an arithmetic number, because the mean of its divisors is an integer number (85899140496).

Almost surely, 2^{1311242365421} is an apocalyptic number.

It is an amenable number.

1311242365421 is a deficient number, since it is larger than the sum of its proper divisors (63143882515).

1311242365421 is a wasteful number, since it uses less digits than its factorization.

1311242365421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46732.

The product of its digits is 34560, while the sum is 35.

Adding to 1311242365421 its reverse (1245632421131), we get a palindrome (2556874786552).

The spelling of 1311242365421 in words is "one trillion, three hundred eleven billion, two hundred forty-two million, three hundred sixty-five thousand, four hundred twenty-one".