20113112112 has 80 divisors (see below), whose sum is σ = 54845953920. Its totient is φ = 6351405120.

The previous prime is 20113112057. The next prime is 20113112119. The reversal of 20113112112 is 21121131102.

It is a super-2 number, since 2×20113112112² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20113112091 and 20113112100.

It is not an unprimeable number, because it can be changed into a prime (20113112119) 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, 298687 + ... + 359777.

It is an arithmetic number, because the mean of its divisors is an integer number (685574424).

Almost surely, 2^20113112112 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20113112112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27422976960).

20113112112 is an abundant number, since it is smaller than the sum of its proper divisors (34732841808).

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

20113112112 is an equidigital number, since it uses as much as digits as its factorization.

20113112112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61159 (or 61115 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 15.

Adding to 20113112112 its reverse (21121131102), we get a palindrome (41234243214).

The spelling of 20113112112 in words is "twenty billion, one hundred thirteen million, one hundred twelve thousand, one hundred twelve".