11031331220020 has 12 divisors (see below), whose sum is σ = 23165795562084. Its totient is φ = 4412532488000.

The previous prime is 11031331219927. The next prime is 11031331220051. The reversal of 11031331220020 is 2002213313011.

It can be written as a sum of positive squares in 2 ways, for example, as 2388366248356 + 8642964971664 = 1545434^2 + 2939892^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 11031331220020.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275783280481 + ... + 275783280520.

It is an arithmetic number, because the mean of its divisors is an integer number (1930482963507).

Almost surely, 2^{11031331220020} is an apocalyptic number.

11031331220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11031331220020 is an abundant number, since it is smaller than the sum of its proper divisors (12134464342064).

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

11031331220020 is a wasteful number, since it uses less digits than its factorization.

11031331220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551566561010 (or 551566561008 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 11031331220020 its reverse (2002213313011), we get a palindrome (13033544533031).

The spelling of 11031331220020 in words is "eleven trillion, thirty-one billion, three hundred thirty-one million, two hundred twenty thousand, twenty".