120002121200 has 120 divisors (see below), whose sum is σ = 310613359056. Its totient is φ = 44289792000.

The previous prime is 120002121181. The next prime is 120002121203. The reversal of 120002121200 is 2121200021.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120002121203) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21270380 + ... + 21276020.

Almost surely, 2^120002121200 is an apocalyptic number.

120002121200 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 120002121200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155306679528).

120002121200 is an abundant number, since it is smaller than the sum of its proper divisors (190611237856).

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

120002121200 is a wasteful number, since it uses less digits than its factorization.

120002121200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9763 (or 9752 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 120002121200 its reverse (2121200021), we get a palindrome (122123321221).

It can be divided in two parts, 1200021 and 21200, that added together give a palindrome (1221221).

The spelling of 120002121200 in words is "one hundred twenty billion, two million, one hundred twenty-one thousand, two hundred".