11102221020 has 96 divisors (see below), whose sum is σ = 33931166976. Its totient is φ = 2689945600.

The previous prime is 11102221019. The next prime is 11102221027. The reversal of 11102221020 is 2012220111.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 11102220987 and 11102221005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11102221027) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1587772 + ... + 1594748.

It is an arithmetic number, because the mean of its divisors is an integer number (353449656).

Almost surely, 2^11102221020 is an apocalyptic number.

11102221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11102221020 is an abundant number, since it is smaller than the sum of its proper divisors (22828945956).

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

11102221020 is a wasteful number, since it uses less digits than its factorization.

11102221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411 (or 9409 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 11102221020 its reverse (2012220111), we get a palindrome (13114441131).

Subtracting from 11102221020 its reverse (2012220111), we obtain a palindrome (9090000909).

The spelling of 11102221020 in words is "eleven billion, one hundred two million, two hundred twenty-one thousand, twenty".