20111112120 has 64 divisors (see below), whose sum is σ = 65818189440. Its totient is φ = 4875420800.

The previous prime is 20111112097. The next prime is 20111112121. The reversal of 20111112120 is 2121111102.

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 = 20111112096 and 20111112105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20111112121) 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, 7616526 + ... + 7619165.

It is an arithmetic number, because the mean of its divisors is an integer number (1028409210).

Almost surely, 2^20111112120 is an apocalyptic number.

20111112120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20111112120 is an abundant number, since it is smaller than the sum of its proper divisors (45707077320).

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

20111112120 is a wasteful number, since it uses less digits than its factorization.

20111112120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15235716 (or 15235712 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 20111112120 its reverse (2121111102), we get a palindrome (22232223222).

It can be divided in two parts, 20111 and 112120, that added together give a palindrome (132231).

The spelling of 20111112120 in words is "twenty billion, one hundred eleven million, one hundred twelve thousand, one hundred twenty".