12111120111220 has 48 divisors (see below), whose sum is σ = 27503414558928. Its totient is φ = 4453242992640.

The previous prime is 12111120111203. The next prime is 12111120111239. The reversal of 12111120111220 is 2211102111121.

It can be written as a sum of positive squares in 8 ways, for example, as 308473603216 + 11802646508004 = 555404^2 + 3435498^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12111120111194 and 12111120111203.

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, 96578899 + ... + 96704218.

It is an arithmetic number, because the mean of its divisors is an integer number (572987803311).

Almost surely, 2^{12111120111220} is an apocalyptic number.

12111120111220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111120111220 is an abundant number, since it is smaller than the sum of its proper divisors (15392294447708).

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

12111120111220 is a wasteful number, since it uses less digits than its factorization.

12111120111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193283380 (or 193283378 counting only the distinct ones).

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

Adding to 12111120111220 its reverse (2211102111121), we get a palindrome (14322222222341).

The spelling of 12111120111220 in words is "twelve trillion, one hundred eleven billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty".