20120121120 has 384 divisors, whose sum is σ = 72287873280. Its totient is φ = 4659200000.

The previous prime is 20120121071. The next prime is 20120121137. The reversal of 20120121120 is 2112102102.

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 = 20120121096 and 20120121105.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15464470 + ... + 15465770.

It is an arithmetic number, because the mean of its divisors is an integer number (188249670).

Almost surely, 2^20120121120 is an apocalyptic number.

20120121120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20120121120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36143936640).

20120121120 is an abundant number, since it is smaller than the sum of its proper divisors (52167752160).

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

20120121120 is a wasteful number, since it uses less digits than its factorization.

20120121120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1460 (or 1452 counting only the distinct ones).

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

Adding to 20120121120 its reverse (2112102102), we get a palindrome (22232223222).

The spelling of 20120121120 in words is "twenty billion, one hundred twenty million, one hundred twenty-one thousand, one hundred twenty".