1311242453340 has 48 divisors (see below), whose sum is σ = 3887448217632. Its totient is φ = 329096144896.

The previous prime is 1311242453317. The next prime is 1311242453347. The reversal of 1311242453340 is 433542421131.

It is a super-2 number, since 2×1311242453340² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311242453347) 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, 642764889 + ... + 642766928.

It is an arithmetic number, because the mean of its divisors is an integer number (80988504534).

Almost surely, 2^{1311242453340} is an apocalyptic number.

1311242453340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311242453340 is an abundant number, since it is smaller than the sum of its proper divisors (2576205764292).

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

1311242453340 is a wasteful number, since it uses less digits than its factorization.

1311242453340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1285531846 (or 1285531844 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

Adding to 1311242453340 its reverse (433542421131), we get a palindrome (1744784874471).

The spelling of 1311242453340 in words is "one trillion, three hundred eleven billion, two hundred forty-two million, four hundred fifty-three thousand, three hundred forty".