11201220020 has 24 divisors (see below), whose sum is σ = 23581829544. Its totient is φ = 4469198976.

The previous prime is 11201220013. The next prime is 11201220059. The reversal of 11201220020 is 2002210211.

It is a happy number.

11201220020 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 5382276496 + 5818943524 = 73364^2 + 76282^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11201219983 and 11201220010.

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, 697427 + ... + 713306.

It is an arithmetic number, because the mean of its divisors is an integer number (982576231).

Almost surely, 2^11201220020 is an apocalyptic number.

11201220020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201220020 is an abundant number, since it is smaller than the sum of its proper divisors (12380609524).

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

11201220020 is a wasteful number, since it uses less digits than its factorization.

11201220020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1411139 (or 1411137 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 11201220020 its reverse (2002210211), we get a palindrome (13203430231).

The spelling of 11201220020 in words is "eleven billion, two hundred one million, two hundred twenty thousand, twenty".