1002022221 has 8 divisors (see below), whose sum is σ = 1336303744. Its totient is φ = 667877760.

The previous prime is 1002022201. The next prime is 1002022223. The reversal of 1002022221 is 1222202001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1002022221 - 2⁶ = 1002022157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1002022197 and 1002022206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002022223) 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, 15781 + ... + 47466.

It is an arithmetic number, because the mean of its divisors is an integer number (167037968).

Almost surely, 2^1002022221 is an apocalyptic number.

It is an amenable number.

1002022221 is a deficient number, since it is larger than the sum of its proper divisors (334281523).

1002022221 is an equidigital number, since it uses as much as digits as its factorization.

1002022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68531.

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

The square root of 1002022221 is about 31654.7345747836. The cubic root of 1002022221 is about 1000.6736198011.

Adding to 1002022221 its reverse (1222202001), we get a palindrome (2224224222).

The spelling of 1002022221 in words is "one billion, two million, twenty-two thousand, two hundred twenty-one".