12111111220120 has 32 divisors (see below), whose sum is σ = 29727272995920. Its totient is φ = 4404040443520.

The previous prime is 12111111220111. The next prime is 12111111220121. The reversal of 12111111220120 is 2102211111121.

It is a super-2 number, since 2×12111111220120² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12111111220094 and 12111111220103.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111111220121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13762625947 + ... + 13762626826.

Almost surely, 2^{12111111220120} is an apocalyptic number.

12111111220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111111220120 is an abundant number, since it is smaller than the sum of its proper divisors (17616161775800).

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

12111111220120 is a wasteful number, since it uses less digits than its factorization.

12111111220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27525252795 (or 27525252791 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 12111111220120 its reverse (2102211111121), we get a palindrome (14213322331241).

The spelling of 12111111220120 in words is "twelve trillion, one hundred eleven billion, one hundred eleven million, two hundred twenty thousand, one hundred twenty".