1200120000000 has 640 divisors, whose sum is σ = 4080800490624. Its totient is φ = 313344000000.

The previous prime is 1200119999987. The next prime is 1200120000043. The reversal of 1200120000000 is 210021.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (640).

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 63 ways as a sum of consecutive naturals, for example, 8759999932 + ... + 8760000068.

Almost surely, 2^{1200120000000} is an apocalyptic number.

1200120000000 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 1200120000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2040400245312).

1200120000000 is an abundant number, since it is smaller than the sum of its proper divisors (2880680490624).

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

1200120000000 is an frugal number, since it uses more digits than its factorization.

1200120000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266 (or 220 counting only the distinct ones).

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

Adding to 1200120000000 its reverse (210021), we get a palindrome (1200120210021).

The spelling of 1200120000000 in words is "one trillion, two hundred billion, one hundred twenty million", and thus it is an aban number.