1311423140244 has 144 divisors (see below), whose sum is σ = 3619588956480. Its totient is φ = 368380938240.

The previous prime is 1311423140239. The next prime is 1311423140249. The reversal of 1311423140244 is 4420413241131.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1311423140239) and next prime (1311423140249).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311423140249) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 92496484 + ... + 92510660.

It is an arithmetic number, because the mean of its divisors is an integer number (25136034420).

Almost surely, 2^{1311423140244} is an apocalyptic number.

1311423140244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311423140244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1809794478240).

1311423140244 is an abundant number, since it is smaller than the sum of its proper divisors (2308165816236).

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

1311423140244 is a wasteful number, since it uses less digits than its factorization.

1311423140244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16838 (or 16829 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

Adding to 1311423140244 its reverse (4420413241131), we get a palindrome (5731836381375).

The spelling of 1311423140244 in words is "one trillion, three hundred eleven billion, four hundred twenty-three million, one hundred forty thousand, two hundred forty-four".