1002032221 has 4 divisors (see below), whose sum is σ = 1013291100. Its totient is φ = 990773344.

The previous prime is 1002032219. The next prime is 1002032233. The reversal of 1002032221 is 1222302001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 467035321 + 534996900 = 21611^2 + 23130^2 .

It is a cyclic number.

It is not a de Polignac number, because 1002032221 - 2¹ = 1002032219 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 (1002032201) 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 3 ways as a sum of consecutive naturals, for example, 5629306 + ... + 5629483.

It is an arithmetic number, because the mean of its divisors is an integer number (253322775).

Almost surely, 2^1002032221 is an apocalyptic number.

It is an amenable number.

1002032221 is a deficient number, since it is larger than the sum of its proper divisors (11258879).

1002032221 is an equidigital number, since it uses as much as digits as its factorization.

1002032221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11258878.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 1002032221 is about 31654.8925286440. The cubic root of 1002032221 is about 1000.6769486371.

Adding to 1002032221 its reverse (1222302001), we get a palindrome (2224334222).

The spelling of 1002032221 in words is "one billion, two million, thirty-two thousand, two hundred twenty-one".