2002011221 has 8 divisors (see below), whose sum is σ = 2288305920. Its totient is φ = 1715789808.

The previous prime is 2002011199. The next prime is 2002011223. The reversal of 2002011221 is 1221102002.

It is a happy number.

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 2002011221 - 2¹⁸ = 2001749077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002011223) 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, 66275 + ... + 91631.

It is an arithmetic number, because the mean of its divisors is an integer number (286038240).

Almost surely, 2^2002011221 is an apocalyptic number.

It is an amenable number.

2002011221 is a deficient number, since it is larger than the sum of its proper divisors (286294699).

2002011221 is a wasteful number, since it uses less digits than its factorization.

2002011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36643.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2002011221 is about 44743.8400341321. The cubic root of 2002011221 is about 1260.3432383531.

Adding to 2002011221 its reverse (1221102002), we get a palindrome (3223113223).

The spelling of 2002011221 in words is "two billion, two million, eleven thousand, two hundred twenty-one".