120203121000000 has 392 divisors, whose sum is σ = 408286438866688. Its totient is φ = 31187808000000.

The previous prime is 120203120999947. The next prime is 120203121000019. The reversal of 120203121000000 is 121302021.

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

It is a self number, because there is not a number n which added to its sum of digits gives 120203121000000.

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, 110458545 + ... + 111541455.

Almost surely, 2^{120203121000000} is an apocalyptic number.

120203121000000 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 120203121000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204143219433344).

120203121000000 is an abundant number, since it is smaller than the sum of its proper divisors (288083317866688).

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

120203121000000 is an frugal number, since it uses more digits than its factorization.

120203121000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082993 (or 1082958 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 120203121000000 its reverse (121302021), we get a palindrome (120203242302021).

The spelling of 120203121000000 in words is "one hundred twenty trillion, two hundred three billion, one hundred twenty-one million", and thus it is an aban number.