11123220222 has 48 divisors (see below), whose sum is σ = 24956568000. Its totient is φ = 3576267072.

The previous prime is 11123220211. The next prime is 11123220223. The reversal of 11123220222 is 22202232111.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 11123220195 and 11123220204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123220223) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 532104 + ... + 552612.

It is an arithmetic number, because the mean of its divisors is an integer number (519928500).

Almost surely, 2^11123220222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11123220222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12478284000).

11123220222 is an abundant number, since it is smaller than the sum of its proper divisors (13833347778).

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

11123220222 is a wasteful number, since it uses less digits than its factorization.

11123220222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21585 (or 21582 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 11123220222 its reverse (22202232111), we get a palindrome (33325452333).

The spelling of 11123220222 in words is "eleven billion, one hundred twenty-three million, two hundred twenty thousand, two hundred twenty-two".