1331111332020 has 96 divisors (see below), whose sum is σ = 3890165771520. Its totient is φ = 339442048000.

The previous prime is 1331111332007. The next prime is 1331111332087. The reversal of 1331111332020 is 202331111331.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5299270 + ... + 5544770.

It is an arithmetic number, because the mean of its divisors is an integer number (40522560120).

Almost surely, 2^{1331111332020} is an apocalyptic number.

1331111332020 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 1331111332020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1945082885760).

1331111332020 is an abundant number, since it is smaller than the sum of its proper divisors (2559054439500).

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

1331111332020 is a wasteful number, since it uses less digits than its factorization.

1331111332020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249465 (or 249463 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 1331111332020 its reverse (202331111331), we get a palindrome (1533442443351).

The spelling of 1331111332020 in words is "one trillion, three hundred thirty-one billion, one hundred eleven million, three hundred thirty-two thousand, twenty".