12111112122220 has 12 divisors (see below), whose sum is σ = 25433335456704. Its totient is φ = 4844444848880.

The previous prime is 12111112122199. The next prime is 12111112122229. The reversal of 12111112122220 is 2222121111121.

It is a happy number.

12111112122220 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-3 number, since 3×12111112122220³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (12111112122229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302777803036 + ... + 302777803075.

It is an arithmetic number, because the mean of its divisors is an integer number (2119444621392).

Almost surely, 2^{12111112122220} is an apocalyptic number.

12111112122220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111112122220 is an abundant number, since it is smaller than the sum of its proper divisors (13322223334484).

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

12111112122220 is a wasteful number, since it uses less digits than its factorization.

12111112122220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 605555606120 (or 605555606118 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 12111112122220 its reverse (2222121111121), we get a palindrome (14333233233341).

The spelling of 12111112122220 in words is "twelve trillion, one hundred eleven billion, one hundred twelve million, one hundred twenty-two thousand, two hundred twenty".