1311234243011 has 16 divisors (see below), whose sum is σ = 1634903688960. Its totient is φ = 1021667131680.

The previous prime is 1311234242953. The next prime is 1311234243029. The reversal of 1311234243011 is 1103424321131.

It is a cyclic number.

It is not a de Polignac number, because 1311234243011 - 2¹⁰ = 1311234241987 is a prime.

It is a super-2 number, since 2×1311234243011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1311234242011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 469460 + ... + 1686078.

It is an arithmetic number, because the mean of its divisors is an integer number (102181480560).

Almost surely, 2^{1311234243011} is an apocalyptic number.

1311234243011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1311234243011 is a deficient number, since it is larger than the sum of its proper divisors (323669445949).

1311234243011 is a wasteful number, since it uses less digits than its factorization.

1311234243011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230634.

The product of its (nonzero) digits is 1728, while the sum is 26.

Adding to 1311234243011 its reverse (1103424321131), we get a palindrome (2414658564142).

The spelling of 1311234243011 in words is "one trillion, three hundred eleven billion, two hundred thirty-four million, two hundred forty-three thousand, eleven".