11020031220 has 96 divisors (see below), whose sum is σ = 33994670976. Its totient is φ = 2645056000.

The previous prime is 11020031213. The next prime is 11020031221. The reversal of 11020031220 is 2213002011.

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 = 11020031196 and 11020031205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020031221) 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, 15999 + ... + 149318.

It is an arithmetic number, because the mean of its divisors is an integer number (354111156).

Almost surely, 2^11020031220 is an apocalyptic number.

11020031220 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 11020031220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16997335488).

11020031220 is an abundant number, since it is smaller than the sum of its proper divisors (22974639756).

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

11020031220 is a wasteful number, since it uses less digits than its factorization.

11020031220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165441 (or 165439 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 11020031220 its reverse (2213002011), we get a palindrome (13233033231).

The spelling of 11020031220 in words is "eleven billion, twenty million, thirty-one thousand, two hundred twenty".