2002101221 has 8 divisors (see below), whose sum is σ = 2037765600. Its totient is φ = 1966494640.

The previous prime is 2002101181. The next prime is 2002101223. The reversal of 2002101221 is 1221012002.

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 a de Polignac number, because none of the positive numbers 2^k-2002101221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2002101223) 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 7 ways as a sum of consecutive naturals, for example, 58706 + ... + 86316.

It is an arithmetic number, because the mean of its divisors is an integer number (254720700).

Almost surely, 2^2002101221 is an apocalyptic number.

It is an amenable number.

2002101221 is a deficient number, since it is larger than the sum of its proper divisors (35664379).

2002101221 is a wasteful number, since it uses less digits than its factorization.

2002101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28899.

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

The square root of 2002101221 is about 44744.8457478624. The cubic root of 2002101221 is about 1260.3621242265.

Adding to 2002101221 its reverse (1221012002), we get a palindrome (3223113223).

The spelling of 2002101221 in words is "two billion, two million, one hundred one thousand, two hundred twenty-one".