120001120020 has 144 divisors (see below), whose sum is σ = 369384043392. Its totient is φ = 31527901440.

The previous prime is 120001120013. The next prime is 120001120033. The reversal of 120001120020 is 20021100021.

120001120020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120001119984 and 120001120011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28280019 + ... + 28284261.

It is an arithmetic number, because the mean of its divisors is an integer number (2565166968).

Almost surely, 2^120001120020 is an apocalyptic number.

120001120020 is a gapful number since it is divisible by the number (10) 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 120001120020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184692021696).

120001120020 is an abundant number, since it is smaller than the sum of its proper divisors (249382923372).

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

120001120020 is a wasteful number, since it uses less digits than its factorization.

120001120020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6542 (or 6537 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 120001120020 its reverse (20021100021), we get a palindrome (140022220041).

The spelling of 120001120020 in words is "one hundred twenty billion, one million, one hundred twenty thousand, twenty".