2002201221121 has 4 divisors (see below), whose sum is σ = 2021640068032. Its totient is φ = 1982762374212.

The previous prime is 2002201221091. The next prime is 2002201221169. The reversal of 2002201221121 is 1211221022002.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2002201221121 - 2¹⁷ = 2002201090049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2002201221095 and 2002201221104.

It is not an unprimeable number, because it can be changed into a prime (2002201291121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9719423301 + ... + 9719423506.

It is an arithmetic number, because the mean of its divisors is an integer number (505410017008).

Almost surely, 2^{2002201221121} is an apocalyptic number.

It is an amenable number.

2002201221121 is a deficient number, since it is larger than the sum of its proper divisors (19438846911).

2002201221121 is a wasteful number, since it uses less digits than its factorization.

2002201221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19438846910.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 2002201221121 its reverse (1211221022002), we get a palindrome (3213422243123).

The spelling of 2002201221121 in words is "two trillion, two billion, two hundred one million, two hundred twenty-one thousand, one hundred twenty-one".