1311550211005 has 16 divisors (see below), whose sum is σ = 1628313840000. Its totient is φ = 1012945890880.

The previous prime is 1311550210937. The next prime is 1311550211011. The reversal of 1311550211005 is 5001120551131.

It is not a de Polignac number, because 1311550211005 - 2⁷ = 1311550210877 is a prime.

It is a super-2 number, since 2×1311550211005² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 802290 + ... + 1807420.

It is an arithmetic number, because the mean of its divisors is an integer number (101769615000).

Almost surely, 2^{1311550211005} is an apocalyptic number.

It is an amenable number.

1311550211005 is a deficient number, since it is larger than the sum of its proper divisors (316763628995).

1311550211005 is a wasteful number, since it uses less digits than its factorization.

1311550211005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1014164.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 1311550211005 its reverse (5001120551131), we get a palindrome (6312670762136).

The spelling of 1311550211005 in words is "one trillion, three hundred eleven billion, five hundred fifty million, two hundred eleven thousand, five".