11211222 has 32 divisors (see below), whose sum is σ = 25127424. Its totient is φ = 3304800.

The previous prime is 11211217. The next prime is 11211229. The reversal of 11211222 is 22211211.

11211222 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 11211198 and 11211207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11211229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 147 + ... + 4737.

It is an arithmetic number, because the mean of its divisors is an integer number (785232).

Almost surely, 2^11211222 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11211222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12563712).

11211222 is an abundant number, since it is smaller than the sum of its proper divisors (13916202).

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

11211222 is a wasteful number, since it uses less digits than its factorization.

11211222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4644.

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

The square root of 11211222 is about 3348.3162933032. The cubic root of 11211222 is about 223.8124892304.

Adding to 11211222 its reverse (22211211), we get a palindrome (33422433).

It can be divided in two parts, 11211 and 222, that multiplied together give a palindrome (2488842).

The spelling of 11211222 in words is "eleven million, two hundred eleven thousand, two hundred twenty-two".