121202100200 has 96 divisors (see below), whose sum is σ = 286387920000. Its totient is φ = 47695065600.

The previous prime is 121202100179. The next prime is 121202100209. The reversal of 121202100200 is 2001202121.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (121202100209) 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, 4426151 + ... + 4453449.

It is an arithmetic number, because the mean of its divisors is an integer number (2983207500).

Almost surely, 2^121202100200 is an apocalyptic number.

121202100200 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 121202100200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143193960000).

121202100200 is an abundant number, since it is smaller than the sum of its proper divisors (165185819800).

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

121202100200 is a wasteful number, since it uses less digits than its factorization.

121202100200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27675 (or 27666 counting only the distinct ones).

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

Adding to 121202100200 its reverse (2001202121), we get a palindrome (123203302321).

The spelling of 121202100200 in words is "one hundred twenty-one billion, two hundred two million, one hundred thousand, two hundred".