120021000020 has 48 divisors (see below), whose sum is σ = 257022460800. Its totient is φ = 47067699840.

The previous prime is 120021000019. The next prime is 120021000031. The reversal of 120021000020 is 20000120021.

120021000020 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 120020999971 and 120021000007.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18086 + ... + 490274.

It is an arithmetic number, because the mean of its divisors is an integer number (5354634600).

Almost surely, 2^120021000020 is an apocalyptic number.

120021000020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120021000020 is an abundant number, since it is smaller than the sum of its proper divisors (137001460780).

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

120021000020 is a wasteful number, since it uses less digits than its factorization.

120021000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 472448 (or 472446 counting only the distinct ones).

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

Adding to 120021000020 its reverse (20000120021), we get a palindrome (140021120041).

The spelling of 120021000020 in words is "one hundred twenty billion, twenty-one million, twenty", and thus it is an aban number.