120021000000 has 392 divisors, whose sum is σ = 433143830688. Its totient is φ = 29088000000.

The previous prime is 120020999999. The next prime is 120021000019. The reversal of 120021000000 is 120021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (6).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 32998182 + ... + 33001818.

Almost surely, 2^120021000000 is an apocalyptic number.

120021000000 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 120021000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (216571915344).

120021000000 is an abundant number, since it is smaller than the sum of its proper divisors (313122830688).

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

120021000000 is an frugal number, since it uses more digits than its factorization.

120021000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3693 (or 3658 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 6.

Adding to 120021000000 its reverse (120021), we get a palindrome (120021120021).

120021000000 divided by its reverse (120021) gives a 6-th power (1000000 = 10⁶).

The spelling of 120021000000 in words is "one hundred twenty billion, twenty-one million", and thus it is an aban number.