1311244223436 has 96 divisors (see below), whose sum is σ = 4010496143360. Its totient is φ = 362556000000.

The previous prime is 1311244223411. The next prime is 1311244223437. The reversal of 1311244223436 is 6343224421131.

It is a super-2 number, since 2×1311244223436² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1311244223436.

It is not an unprimeable number, because it can be changed into a prime (1311244223437) 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 31 ways as a sum of consecutive naturals, for example, 27951565 + ... + 27998436.

Almost surely, 2^{1311244223436} is an apocalyptic number.

It is an amenable number.

1311244223436 is an abundant number, since it is smaller than the sum of its proper divisors (2699251919924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311244223436 is a wasteful number, since it uses less digits than its factorization.

1311244223436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55950052 (or 55950044 counting only the distinct ones).

The product of its digits is 82944, while the sum is 36.

Adding to 1311244223436 its reverse (6343224421131), we get a palindrome (7654468644567).

The spelling of 1311244223436 in words is "one trillion, three hundred eleven billion, two hundred forty-four million, two hundred twenty-three thousand, four hundred thirty-six".