1311351112420 has 48 divisors (see below), whose sum is σ = 2799213682608. Its totient is φ = 515898754560.

The previous prime is 1311351112363. The next prime is 1311351112441. The reversal of 1311351112420 is 242111531131.

It can be written as a sum of positive squares in 8 ways, for example, as 332612879076 + 978738233344 = 576726^2 + 989312^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17575914 + ... + 17650366.

It is an arithmetic number, because the mean of its divisors is an integer number (58316951721).

Almost surely, 2^{1311351112420} is an apocalyptic number.

1311351112420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311351112420 is an abundant number, since it is smaller than the sum of its proper divisors (1487862570188).

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

1311351112420 is a wasteful number, since it uses less digits than its factorization.

1311351112420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88960 (or 88958 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 1311351112420 its reverse (242111531131), we get a palindrome (1553462643551).

The spelling of 1311351112420 in words is "one trillion, three hundred eleven billion, three hundred fifty-one million, one hundred twelve thousand, four hundred twenty".