11021223220 has 96 divisors (see below), whose sum is σ = 28803398400. Its totient is φ = 3456359424.

The previous prime is 11021223203. The next prime is 11021223221. The reversal of 11021223220 is 2232212011.

It is a happy number.

It is a super-2 number, since 2×11021223220² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11021223194 and 11021223203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11021223221) 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, 5704 + ... + 148576.

It is an arithmetic number, because the mean of its divisors is an integer number (300035400).

Almost surely, 2^11021223220 is an apocalyptic number.

11021223220 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 11021223220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14401699200).

11021223220 is an abundant number, since it is smaller than the sum of its proper divisors (17782175180).

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

11021223220 is a wasteful number, since it uses less digits than its factorization.

11021223220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142937 (or 142935 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 11021223220 its reverse (2232212011), we get a palindrome (13253435231).

The spelling of 11021223220 in words is "eleven billion, twenty-one million, two hundred twenty-three thousand, two hundred twenty".