11201111020 has 48 divisors (see below), whose sum is σ = 25949095200. Its totient is φ = 4027358720.

The previous prime is 11201110967. The next prime is 11201111029. The reversal of 11201111020 is 2011110211.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a junction number, because it is equal to n+sod(n) for n = 11201110988 and 11201111006.

It is not an unprimeable number, because it can be changed into a prime (11201111029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266455 + ... + 305614.

It is an arithmetic number, because the mean of its divisors is an integer number (540606150).

Almost surely, 2^11201111020 is an apocalyptic number.

11201111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11201111020 is an abundant number, since it is smaller than the sum of its proper divisors (14747984180).

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

11201111020 is a wasteful number, since it uses less digits than its factorization.

11201111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 572178 (or 572176 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 11201111020 its reverse (2011110211), we get a palindrome (13212221231).

It can be divided in two parts, 11201 and 111020, that added together give a palindrome (122221).

The spelling of 11201111020 in words is "eleven billion, two hundred one million, one hundred eleven thousand, twenty".