11220311020 has 24 divisors (see below), whose sum is σ = 23566179168. Its totient is φ = 4487452800.

The previous prime is 11220311009. The next prime is 11220311021. The reversal of 11220311020 is 2011302211.

It is not an unprimeable number, because it can be changed into a prime (11220311021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108105 + ... + 184735.

It is an arithmetic number, because the mean of its divisors is an integer number (981924132).

Almost surely, 2^11220311020 is an apocalyptic number.

11220311020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11220311020 is an abundant number, since it is smaller than the sum of its proper divisors (12345868148).

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

11220311020 is a wasteful number, since it uses less digits than its factorization.

11220311020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83961 (or 83959 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 11220311020 its reverse (2011302211), we get a palindrome (13231613231).

The spelling of 11220311020 in words is "eleven billion, two hundred twenty million, three hundred eleven thousand, twenty".