12211111120 has 80 divisors (see below), whose sum is σ = 30621290112. Its totient is φ = 4501854720.

The previous prime is 12211111117. The next prime is 12211111163. The reversal of 12211111120 is 2111111221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×12211111120² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a self number, because there is not a number n which added to its sum of digits gives 12211111120.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 701725 + ... + 718915.

Almost surely, 2^12211111120 is an apocalyptic number.

12211111120 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 12211111120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15310645056).

12211111120 is an abundant number, since it is smaller than the sum of its proper divisors (18410178992).

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

12211111120 is a wasteful number, since it uses less digits than its factorization.

12211111120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17900 (or 17894 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 12211111120 its reverse (2111111221), we get a palindrome (14322222341).

The spelling of 12211111120 in words is "twelve billion, two hundred eleven million, one hundred eleven thousand, one hundred twenty".