1200000000120 has 128 divisors (see below), whose sum is σ = 3636800354880. Its totient is φ = 316730880000.

The previous prime is 1200000000119. The next prime is 1200000000131. The reversal of 1200000000120 is 210000000021.

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 junction number, because it is equal to n+sod(n) for n = 1200000000099 and 1200000000108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42902940 + ... + 42930900.

Almost surely, 2^{1200000000120} is an apocalyptic number.

1200000000120 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 1200000000120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818400177440).

1200000000120 is an abundant number, since it is smaller than the sum of its proper divisors (2436800354760).

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

1200000000120 is a wasteful number, since it uses less digits than its factorization.

1200000000120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31617 (or 31613 counting only the distinct ones).

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

Adding to 1200000000120 its reverse (210000000021), we get a palindrome (1410000000141).

Subtracting from 1200000000120 its reverse (210000000021), we obtain a palindrome (990000000099).

It can be divided in two parts, 12000000001 and 20, that added together give a palindrome (12000000021).

The spelling of 1200000000120 in words is "one trillion, two hundred billion, one hundred twenty", and thus it is an aban number.