121200021000200 has 24 divisors (see below), whose sum is σ = 281790048825930. Its totient is φ = 48480008400000.

The previous prime is 121200021000193. The next prime is 121200021000209. The reversal of 121200021000200 is 2000120002121.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 83376512393476 + 37823508606724 = 9131074^2 + 6150082^2 .

It is not an unprimeable number, because it can be changed into a prime (121200021000209) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 303000052301 + ... + 303000052700.

Almost surely, 2^{121200021000200} is an apocalyptic number.

121200021000200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121200021000200 is an abundant number, since it is smaller than the sum of its proper divisors (160590027825730).

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

121200021000200 is a wasteful number, since it uses less digits than its factorization.

121200021000200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 606000105017 (or 606000105008 counting only the distinct ones).

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

Adding to 121200021000200 its reverse (2000120002121), we get a palindrome (123200141002321).

The spelling of 121200021000200 in words is "one hundred twenty-one trillion, two hundred billion, twenty-one million, two hundred", and thus it is an aban number.