12111120111020 has 48 divisors (see below), whose sum is σ = 30776493464640. Its totient is φ = 3908126152704.

The previous prime is 12111120111001. The next prime is 12111120111023. The reversal of 12111120111020 is 2011102111121.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 12111120110986 and 12111120111004.

It is not an unprimeable number, because it can be changed into a prime (12111120111023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2544350585 + ... + 2544355344.

It is an arithmetic number, because the mean of its divisors is an integer number (641176947180).

Almost surely, 2^{12111120111020} is an apocalyptic number.

12111120111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12111120111020 is an abundant number, since it is smaller than the sum of its proper divisors (18665373353620).

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

12111120111020 is a wasteful number, since it uses less digits than its factorization.

12111120111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5088705962 (or 5088705960 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 12111120111020 its reverse (2011102111121), we get a palindrome (14122222222141).

The spelling of 12111120111020 in words is "twelve trillion, one hundred eleven billion, one hundred twenty million, one hundred eleven thousand, twenty".