11001222120 has 128 divisors (see below), whose sum is σ = 38071296000. Its totient is φ = 2491044096.

The previous prime is 11001222107. The next prime is 11001222163. The reversal of 11001222120 is 2122210011.

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 = 11001222096 and 11001222105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28681 + ... + 151079.

It is an arithmetic number, because the mean of its divisors is an integer number (297432000).

Almost surely, 2^11001222120 is an apocalyptic number.

11001222120 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 11001222120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19035648000).

11001222120 is an abundant number, since it is smaller than the sum of its proper divisors (27070073880).

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

11001222120 is a wasteful number, since it uses less digits than its factorization.

11001222120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122527 (or 122523 counting only the distinct ones).

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

Adding to 11001222120 its reverse (2122210011), we get a palindrome (13123432131).

The spelling of 11001222120 in words is "eleven billion, one million, two hundred twenty-two thousand, one hundred twenty".