11212221120 has 112 divisors (see below), whose sum is σ = 35835019008. Its totient is φ = 2970086400.

The previous prime is 11212221107. The next prime is 11212221121. The reversal of 11212221120 is 2112221211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 11212221120.

It is not an unprimeable number, because it can be changed into a prime (11212221121) 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, 106287 + ... + 183633.

Almost surely, 2^11212221120 is an apocalyptic number.

11212221120 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 11212221120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17917509504).

11212221120 is an abundant number, since it is smaller than the sum of its proper divisors (24622797888).

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

11212221120 is a wasteful number, since it uses less digits than its factorization.

11212221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77518 (or 77508 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 11212221120 its reverse (2112221211), we get a palindrome (13324442331).

Subtracting from 11212221120 its reverse (2112221211), we obtain a palindrome (9099999909).

The spelling of 11212221120 in words is "eleven billion, two hundred twelve million, two hundred twenty-one thousand, one hundred twenty".