120900000000 has 648 divisors, whose sum is σ = 447124771072. Its totient is φ = 28800000000.

The previous prime is 120899999999. The next prime is 120900000007. The reversal of 120900000000 is 9021.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (120900000007) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3899999985 + ... + 3900000015.

Almost surely, 2^120900000000 is an apocalyptic number.

120900000000 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 120900000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223562385536).

120900000000 is an abundant number, since it is smaller than the sum of its proper divisors (326224771072).

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

120900000000 is an frugal number, since it uses more digits than its factorization.

120900000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 12.

Adding to 120900000000 its reverse (9021), we get a palindrome (120900009021).

The spelling of 120900000000 in words is "one hundred twenty billion, nine hundred million", and thus it is an aban number.