2002020121221 has 16 divisors (see below), whose sum is σ = 2696953022400. Its totient is φ = 1320884402688.

The previous prime is 2002020121187. The next prime is 2002020121247. The reversal of 2002020121221 is 1221210202002.

It is not a de Polignac number, because 2002020121221 - 2¹⁰ = 2002020120197 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 2002020121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002020621221) 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 15 ways as a sum of consecutive naturals, for example, 14419510 + ... + 14557688.

It is an arithmetic number, because the mean of its divisors is an integer number (168559563900).

Almost surely, 2^{2002020121221} is an apocalyptic number.

It is an amenable number.

2002020121221 is a deficient number, since it is larger than the sum of its proper divisors (694932901179).

2002020121221 is a wasteful number, since it uses less digits than its factorization.

2002020121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188068.

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

Adding to 2002020121221 its reverse (1221210202002), we get a palindrome (3223230323223).

The spelling of 2002020121221 in words is "two trillion, two billion, twenty million, one hundred twenty-one thousand, two hundred twenty-one".