1311330444420 has 24 divisors (see below), whose sum is σ = 3671725244544. Its totient is φ = 349688118496.

The previous prime is 1311330444401. The next prime is 1311330444451. The reversal of 1311330444420 is 244440331131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10927753644 + ... + 10927753763.

It is an arithmetic number, because the mean of its divisors is an integer number (152988551856).

Almost surely, 2^{1311330444420} is an apocalyptic number.

1311330444420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311330444420 is an abundant number, since it is smaller than the sum of its proper divisors (2360394800124).

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

1311330444420 is a wasteful number, since it uses less digits than its factorization.

1311330444420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21855507419 (or 21855507417 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 1311330444420 its reverse (244440331131), we get a palindrome (1555770775551).

The spelling of 1311330444420 in words is "one trillion, three hundred eleven billion, three hundred thirty million, four hundred forty-four thousand, four hundred twenty".