20112012120 has 64 divisors (see below), whose sum is σ = 60375997440. Its totient is φ = 5359651200.

The previous prime is 20112012113. The next prime is 20112012139. The reversal of 20112012120 is 2121021102.

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 = 20112012096 and 20112012105.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128985 + ... + 238455.

It is an arithmetic number, because the mean of its divisors is an integer number (943374960).

Almost surely, 2^20112012120 is an apocalyptic number.

20112012120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20112012120 is an abundant number, since it is smaller than the sum of its proper divisors (40263985320).

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

20112012120 is a wasteful number, since it uses less digits than its factorization.

20112012120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111016 (or 111012 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 20112012120 its reverse (2121021102), we get a palindrome (22233033222).

The spelling of 20112012120 in words is "twenty billion, one hundred twelve million, twelve thousand, one hundred twenty".