1002201221 has 32 divisors (see below), whose sum is σ = 1246088448. Its totient is φ = 786539520.

The previous prime is 1002201217. The next prime is 1002201223. The reversal of 1002201221 is 1221022001.

It is a happy number.

1002201221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1002201221 - 2² = 1002201217 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 (1002201223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 825611 + ... + 826823.

It is an arithmetic number, because the mean of its divisors is an integer number (38940264).

Almost surely, 2^1002201221 is an apocalyptic number.

It is an amenable number.

1002201221 is a deficient number, since it is larger than the sum of its proper divisors (243887227).

1002201221 is a wasteful number, since it uses less digits than its factorization.

1002201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1421.

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

The square root of 1002201221 is about 31657.5618296798. The cubic root of 1002201221 is about 1000.7332026159.

Adding to 1002201221 its reverse (1221022001), we get a palindrome (2223223222).

The spelling of 1002201221 in words is "one billion, two million, two hundred one thousand, two hundred twenty-one".