2002022221 has 8 divisors (see below), whose sum is σ = 2192884920. Its totient is φ = 1819281408.

The previous prime is 2002022207. The next prime is 2002022263. The reversal of 2002022221 is 1222202002.

It can be written as a sum of positive squares in 4 ways, for example, as 501312100 + 1500710121 = 22390^2 + 38739^2 .

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 2002022221 - 2¹⁵ = 2001989453 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 (2002022291) 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, 2029956 + ... + 2030941.

It is an arithmetic number, because the mean of its divisors is an integer number (274110615).

Almost surely, 2^2002022221 is an apocalyptic number.

It is an amenable number.

2002022221 is a deficient number, since it is larger than the sum of its proper divisors (190862699).

2002022221 is a wasteful number, since it uses less digits than its factorization.

2002022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4060943.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 2002022221 is about 44743.9629559117. The cubic root of 2002022221 is about 1260.3455466569.

Adding to 2002022221 its reverse (1222202002), we get a palindrome (3224224223).

The spelling of 2002022221 in words is "two billion, two million, twenty-two thousand, two hundred twenty-one".