12111311120 has 20 divisors (see below), whose sum is σ = 28158798540. Its totient is φ = 4844524416.

The previous prime is 12111311099. The next prime is 12111311131. The reversal of 12111311120 is 2111311121.

It can be written as a sum of positive squares in 2 ways, for example, as 1615718416 + 10495592704 = 40196^2 + 102448^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 12111311095 and 12111311104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75695615 + ... + 75695774.

It is an arithmetic number, because the mean of its divisors is an integer number (1407939927).

Almost surely, 2^12111311120 is an apocalyptic number.

12111311120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111311120 is an abundant number, since it is smaller than the sum of its proper divisors (16047487420).

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

12111311120 is a wasteful number, since it uses less digits than its factorization.

12111311120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151391402 (or 151391396 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 12111311120 its reverse (2111311121), we get a palindrome (14222622241).

Subtracting from 12111311120 its reverse (2111311121), we obtain a palindrome (9999999999).

The spelling of 12111311120 in words is "twelve billion, one hundred eleven million, three hundred eleven thousand, one hundred twenty".