1311421523215 has 16 divisors (see below), whose sum is σ = 1628010820800. Its totient is φ = 1012935635712.

The previous prime is 1311421523213. The next prime is 1311421523239. The reversal of 1311421523215 is 5123251241131.

It is a cyclic number.

It is not a de Polignac number, because 1311421523215 - 2¹ = 1311421523213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311421523213) 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, 7986379 + ... + 8148931.

It is an arithmetic number, because the mean of its divisors is an integer number (101750676300).

Almost surely, 2^{1311421523215} is an apocalyptic number.

1311421523215 is a deficient number, since it is larger than the sum of its proper divisors (316589297585).

1311421523215 is a wasteful number, since it uses less digits than its factorization.

1311421523215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218226.

The product of its digits is 7200, while the sum is 31.

Adding to 1311421523215 its reverse (5123251241131), we get a palindrome (6434672764346).

The spelling of 1311421523215 in words is "one trillion, three hundred eleven billion, four hundred twenty-one million, five hundred twenty-three thousand, two hundred fifteen".