13111120020 has 24 divisors (see below), whose sum is σ = 36711136224. Its totient is φ = 3496298656.

The previous prime is 13111120013. The next prime is 13111120021. The reversal of 13111120020 is 2002111131.

13111120020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 13111119978 and 13111120005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13111120021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109259274 + ... + 109259393.

It is an arithmetic number, because the mean of its divisors is an integer number (1529630676).

Almost surely, 2^13111120020 is an apocalyptic number.

13111120020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13111120020 is an abundant number, since it is smaller than the sum of its proper divisors (23600016204).

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

13111120020 is a wasteful number, since it uses less digits than its factorization.

13111120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218518679 (or 218518677 counting only the distinct ones).

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

Adding to 13111120020 its reverse (2002111131), we get a palindrome (15113231151).

The spelling of 13111120020 in words is "thirteen billion, one hundred eleven million, one hundred twenty thousand, twenty".