2002201221 has 16 divisors (see below), whose sum is σ = 2787428736. Its totient is φ = 1275960576.

The previous prime is 2002201219. The next prime is 2002201237. The reversal of 2002201221 is 1221022002.

It is not a de Polignac number, because 2002201221 - 2¹ = 2002201219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2002201197 and 2002201206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002201211) 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 15 ways as a sum of consecutive naturals, for example, 112681 + ... + 129233.

It is an arithmetic number, because the mean of its divisors is an integer number (174214296).

Almost surely, 2^2002201221 is an apocalyptic number.

It is an amenable number.

2002201221 is a deficient number, since it is larger than the sum of its proper divisors (785227515).

2002201221 is a wasteful number, since it uses less digits than its factorization.

2002201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18332.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 2002201221 is about 44745.9631810513. The cubic root of 2002201221 is about 1260.3831078666.

Adding to 2002201221 its reverse (1221022002), we get a palindrome (3223223223).

The spelling of 2002201221 in words is "two billion, two million, two hundred one thousand, two hundred twenty-one".