1331031113500 has 192 divisors, whose sum is σ = 3254226917760. Its totient is φ = 471386880000.

The previous prime is 1331031113491. The next prime is 1331031113513. The reversal of 1331031113500 is 53111301331.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138226686 + ... + 138236314.

It is an arithmetic number, because the mean of its divisors is an integer number (16949098530).

Almost surely, 2^{1331031113500} is an apocalyptic number.

1331031113500 is a gapful number since it is divisible by the number (10) 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 1331031113500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1627113458880).

1331031113500 is an abundant number, since it is smaller than the sum of its proper divisors (1923195804260).

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

1331031113500 is a wasteful number, since it uses less digits than its factorization.

1331031113500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10313 (or 10301 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 22.

Adding to 1331031113500 its reverse (53111301331), we get a palindrome (1384142414831).

The spelling of 1331031113500 in words is "one trillion, three hundred thirty-one billion, thirty-one million, one hundred thirteen thousand, five hundred".