11022311220 has 96 divisors (see below), whose sum is σ = 31963631616. Its totient is φ = 2836176000.

The previous prime is 11022311197. The next prime is 11022311227. The reversal of 11022311220 is 2211322011.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11022311220.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11022311227) 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, 172695 + ... + 227745.

It is an arithmetic number, because the mean of its divisors is an integer number (332954496).

Almost surely, 2^11022311220 is an apocalyptic number.

11022311220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11022311220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15981815808).

11022311220 is an abundant number, since it is smaller than the sum of its proper divisors (20941320396).

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

11022311220 is a wasteful number, since it uses less digits than its factorization.

11022311220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55181 (or 55179 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 11022311220 its reverse (2211322011), we get a palindrome (13233633231).

The spelling of 11022311220 in words is "eleven billion, twenty-two million, three hundred eleven thousand, two hundred twenty".