2000121220221 has 16 divisors (see below), whose sum is σ = 2817485510400. Its totient is φ = 1260042125888.

The previous prime is 2000121220211. The next prime is 2000121220231. The reversal of 2000121220221 is 1220221210002.

It is an interprime number because it is at equal distance from previous prime (2000121220211) and next prime (2000121220231).

It is a cyclic number.

It is not a de Polignac number, because 2000121220221 - 2³⁹ = 1450365406333 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2000121220221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2000121220211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 244569306 + ... + 244577483.

It is an arithmetic number, because the mean of its divisors is an integer number (176092844400).

Almost surely, 2^{2000121220221} is an apocalyptic number.

It is an amenable number.

2000121220221 is a deficient number, since it is larger than the sum of its proper divisors (817364290179).

2000121220221 is a wasteful number, since it uses less digits than its factorization.

2000121220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489146868.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 2000121220221 its reverse (1220221210002), we get a palindrome (3220342430223).

The spelling of 2000121220221 in words is "two trillion, one hundred twenty-one million, two hundred twenty thousand, two hundred twenty-one".