121200201020121 has 8 divisors (see below), whose sum is σ = 161600323965600. Its totient is φ = 80800106044032.

The previous prime is 121200201020081. The next prime is 121200201020179. The reversal of 121200201020121 is 121020102002121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121200201020121 - 2²³ = 121200192631513 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121200201020121.

It is not an unprimeable number, because it can be changed into a prime (121200201020221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7281001 + ... + 17187593.

It is an arithmetic number, because the mean of its divisors is an integer number (20200040495700).

Almost surely, 2^{121200201020121} is an apocalyptic number.

It is an amenable number.

121200201020121 is a deficient number, since it is larger than the sum of its proper divisors (40400122945479).

121200201020121 is an equidigital number, since it uses as much as digits as its factorization.

121200201020121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13984695.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 121200201020121 its reverse (121020102002121), we get a palindrome (242220303022242).

The spelling of 121200201020121 in words is "one hundred twenty-one trillion, two hundred billion, two hundred one million, twenty thousand, one hundred twenty-one".