1331521111120 has 40 divisors (see below), whose sum is σ = 3258722723040. Its totient is φ = 504576420480.

The previous prime is 1331521111103. The next prime is 1331521111147. The reversal of 1331521111120 is 211111251331.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 1331521111091 and 1331521111100.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 437998846 + ... + 438001885.

It is an arithmetic number, because the mean of its divisors is an integer number (81468068076).

Almost surely, 2^{1331521111120} is an apocalyptic number.

1331521111120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1331521111120 is an abundant number, since it is smaller than the sum of its proper divisors (1927201611920).

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

1331521111120 is a wasteful number, since it uses less digits than its factorization.

1331521111120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876000763 (or 876000757 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 22.

Adding to 1331521111120 its reverse (211111251331), we get a palindrome (1542632362451).

The spelling of 1331521111120 in words is "one trillion, three hundred thirty-one billion, five hundred twenty-one million, one hundred eleven thousand, one hundred twenty".