121001020000200 has 144 divisors (see below), whose sum is σ = 406451155528080. Its totient is φ = 32259840170880.

The previous prime is 121001020000153. The next prime is 121001020000319. The reversal of 121001020000200 is 2000020100121.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 792607 + ... + 15576593.

It is an arithmetic number, because the mean of its divisors is an integer number (2822577468945).

Almost surely, 2^{121001020000200} is an apocalyptic number.

121001020000200 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 121001020000200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203225577764040).

121001020000200 is an abundant number, since it is smaller than the sum of its proper divisors (285450135527880).

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

121001020000200 is a wasteful number, since it uses less digits than its factorization.

121001020000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14788556 (or 14788544 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

Adding to 121001020000200 its reverse (2000020100121), we get a palindrome (123001040100321).

The spelling of 121001020000200 in words is "one hundred twenty-one trillion, one billion, twenty million, two hundred", and thus it is an aban number.