20121120120 has 32 divisors (see below), whose sum is σ = 60363360720. Its totient is φ = 5365632000.

The previous prime is 20121120079. The next prime is 20121120127. The reversal of 20121120120 is 2102112102.

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 = 20121120096 and 20121120105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20121120127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 83837881 + ... + 83838120.

Almost surely, 2^20121120120 is an apocalyptic number.

20121120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20121120120 is an abundant number, since it is smaller than the sum of its proper divisors (40242240600).

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

20121120120 is a wasteful number, since it uses less digits than its factorization.

20121120120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167676015 (or 167676011 counting only the distinct ones).

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

Adding to 20121120120 its reverse (2102112102), we get a palindrome (22223232222).

The spelling of 20121120120 in words is "twenty billion, one hundred twenty-one million, one hundred twenty thousand, one hundred twenty".