20030010221 has 4 divisors (see below), whose sum is σ = 21570780252. Its totient is φ = 18489240192.

The previous prime is 20030010211. The next prime is 20030010269. The reversal of 20030010221 is 12201003002.

It is a happy number.

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 13412187721 + 6617822500 = 115811^2 + 81350^2 .

It is a cyclic number.

It is not a de Polignac number, because 20030010221 - 2¹⁸ = 20029748077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20030010211) 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, 770384996 + ... + 770385021.

It is an arithmetic number, because the mean of its divisors is an integer number (5392695063).

Almost surely, 2^20030010221 is an apocalyptic number.

It is an amenable number.

20030010221 is a deficient number, since it is larger than the sum of its proper divisors (1540770031).

20030010221 is a wasteful number, since it uses less digits than its factorization.

20030010221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1540770030.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20030010221 its reverse (12201003002), we get a palindrome (32231013223).

The spelling of 20030010221 in words is "twenty billion, thirty million, ten thousand, two hundred twenty-one".