11331131021220 has 24 divisors (see below), whose sum is σ = 31727166859584. Its totient is φ = 3021634938976.

The previous prime is 11331131021183. The next prime is 11331131021269. The reversal of 11331131021220 is 2212013113311.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 94426091784 + ... + 94426091903.

It is an arithmetic number, because the mean of its divisors is an integer number (1321965285816).

Almost surely, 2^{11331131021220} is an apocalyptic number.

11331131021220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11331131021220 is an abundant number, since it is smaller than the sum of its proper divisors (20396035838364).

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

11331131021220 is a wasteful number, since it uses less digits than its factorization.

11331131021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188852183699 (or 188852183697 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 11331131021220 its reverse (2212013113311), we get a palindrome (13543144134531).

The spelling of 11331131021220 in words is "eleven trillion, three hundred thirty-one billion, one hundred thirty-one million, twenty-one thousand, two hundred twenty".