11212222220 has 12 divisors (see below), whose sum is σ = 23545666704. Its totient is φ = 4484888880.

The previous prime is 11212222207. The next prime is 11212222243. The reversal of 11212222220 is 2222221211.

It is a happy number.

11212222220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×11212222220² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280305536 + ... + 280305575.

It is an arithmetic number, because the mean of its divisors is an integer number (1962138892).

Almost surely, 2^11212222220 is an apocalyptic number.

11212222220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11212222220 is an abundant number, since it is smaller than the sum of its proper divisors (12333444484).

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

11212222220 is a wasteful number, since it uses less digits than its factorization.

11212222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560611120 (or 560611118 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 11212222220 its reverse (2222221211), we get a palindrome (13434443431).

The spelling of 11212222220 in words is "eleven billion, two hundred twelve million, two hundred twenty-two thousand, two hundred twenty".