11000001220 has 24 divisors (see below), whose sum is σ = 24876926424. Its totient is φ = 4061538816.

The previous prime is 11000001209. The next prime is 11000001239. The reversal of 11000001220 is 2210000011.

11000001220 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 716418756 + 10283582464 = 26766^2 + 101408^2 .

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, 21153589 + ... + 21154108.

It is an arithmetic number, because the mean of its divisors is an integer number (1036538601).

Almost surely, 2^11000001220 is an apocalyptic number.

11000001220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11000001220 is an abundant number, since it is smaller than the sum of its proper divisors (13876925204).

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

11000001220 is a wasteful number, since it uses less digits than its factorization.

11000001220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42307719 (or 42307717 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 7.

Adding to 11000001220 its reverse (2210000011), we get a palindrome (13210001231).

The spelling of 11000001220 in words is "eleven billion, one thousand, two hundred twenty".