11331131331220 has 24 divisors (see below), whose sum is σ = 24121339850664. Its totient is φ = 4470364141056.

The previous prime is 11331131331217. The next prime is 11331131331229. The reversal of 11331131331220 is 2213313113311.

It can be written as a sum of positive squares in 4 ways, for example, as 5197871053456 + 6133260277764 = 2279884^2 + 2476542^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331131331229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3880522969 + ... + 3880525888.

It is an arithmetic number, because the mean of its divisors is an integer number (1005055827111).

Almost surely, 2^{11331131331220} is an apocalyptic number.

11331131331220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11331131331220 is an abundant number, since it is smaller than the sum of its proper divisors (12790208519444).

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

11331131331220 is a wasteful number, since it uses less digits than its factorization.

11331131331220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7761048939 (or 7761048937 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 25.

Adding to 11331131331220 its reverse (2213313113311), we get a palindrome (13544444444531).

The spelling of 11331131331220 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, three hundred thirty-one thousand, two hundred twenty".