11031232220 has 12 divisors (see below), whose sum is σ = 23165587704. Its totient is φ = 4412492880.

The previous prime is 11031232217. The next prime is 11031232273. The reversal of 11031232220 is 2223213011.

11031232220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11031232220² (a number of 21 digits) contains 22 as substring.

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, 275780786 + ... + 275780825.

It is an arithmetic number, because the mean of its divisors is an integer number (1930465642).

Almost surely, 2^11031232220 is an apocalyptic number.

11031232220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11031232220 is an abundant number, since it is smaller than the sum of its proper divisors (12134355484).

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

11031232220 is a wasteful number, since it uses less digits than its factorization.

11031232220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551561620 (or 551561618 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 11031232220 its reverse (2223213011), we get a palindrome (13254445231).

The spelling of 11031232220 in words is "eleven billion, thirty-one million, two hundred thirty-two thousand, two hundred twenty".