2002121112221 has 8 divisors (see below), whose sum is σ = 2003798995200. Its totient is φ = 2000443928032.

The previous prime is 2002121112181. The next prime is 2002121112241. The reversal of 2002121112221 is 1222111212002.

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

It is a cyclic number.

It is not a de Polignac number, because 2002121112221 - 2⁶ = 2002121112157 is a prime.

It is a Duffinian number.

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 2002121112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002121112241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5638676 + ... + 5983218.

It is an arithmetic number, because the mean of its divisors is an integer number (250474874400).

Almost surely, 2^{2002121112221} is an apocalyptic number.

It is an amenable number.

2002121112221 is a deficient number, since it is larger than the sum of its proper divisors (1677882979).

2002121112221 is a wasteful number, since it uses less digits than its factorization.

2002121112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349395.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 2002121112221 its reverse (1222111212002), we get a palindrome (3224232324223).

The spelling of 2002121112221 in words is "two trillion, two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred twenty-one".