11030031220 has 24 divisors (see below), whose sum is σ = 24944840424. Its totient is φ = 4072626816.

The previous prime is 11030031209. The next prime is 11030031247. The reversal of 11030031220 is 2213003011.

11030031220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 171557604 + 10858473616 = 13098^2 + 104204^2 .

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 11030031220.

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 7 ways as a sum of consecutive naturals, for example, 21211339 + ... + 21211858.

It is an arithmetic number, because the mean of its divisors is an integer number (1039368351).

Almost surely, 2^11030031220 is an apocalyptic number.

11030031220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11030031220 is an abundant number, since it is smaller than the sum of its proper divisors (13914809204).

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

11030031220 is a wasteful number, since it uses less digits than its factorization.

11030031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42423219 (or 42423217 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

Adding to 11030031220 its reverse (2213003011), we get a palindrome (13243034231).

The spelling of 11030031220 in words is "eleven billion, thirty million, thirty-one thousand, two hundred twenty".