11331131311220 has 72 divisors (see below), whose sum is σ = 27684641365920. Its totient is φ = 3884354913600.

The previous prime is 11331131311217. The next prime is 11331131311229. The reversal of 11331131311220 is 2211313113311.

It is a super-2 number, since 2×11331131311220² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331131311229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5425811 + ... + 7218149.

It is an arithmetic number, because the mean of its divisors is an integer number (384508907860).

Almost surely, 2^{11331131311220} is an apocalyptic number.

11331131311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11331131311220 is an abundant number, since it is smaller than the sum of its proper divisors (16353510054700).

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

11331131311220 is a wasteful number, since it uses less digits than its factorization.

11331131311220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1798813 (or 1798804 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

Adding to 11331131311220 its reverse (2211313113311), we get a palindrome (13542444424531).

The spelling of 11331131311220 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, three hundred eleven thousand, two hundred twenty".