20002000221 has 64 divisors (see below), whose sum is σ = 34086338560. Its totient is φ = 11355603840.

The previous prime is 20002000217. The next prime is 20002000253. The reversal of 20002000221 is 12200020002.

It is not a de Polignac number, because 20002000221 - 2² = 20002000217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002000261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 31698576 + ... + 31699206.

It is an arithmetic number, because the mean of its divisors is an integer number (532599040).

Almost surely, 2^20002000221 is an apocalyptic number.

20002000221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

20002000221 is a deficient number, since it is larger than the sum of its proper divisors (14084338339).

20002000221 is a wasteful number, since it uses less digits than its factorization.

20002000221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471 (or 1465 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20002000221 its reverse (12200020002), we get a palindrome (32202020223).

The spelling of 20002000221 in words is "twenty billion, two million, two hundred twenty-one", and thus it is an aban number.