20002100221 has 8 divisors (see below), whose sum is σ = 20118518784. Its totient is φ = 19885746960.

The previous prime is 20002100207. The next prime is 20002100257. The reversal of 20002100221 is 12200120002.

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 20002100221 - 2⁷ = 20002100093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20002100198 and 20002100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002100021) 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, 684900 + ... + 713506.

It is an arithmetic number, because the mean of its divisors is an integer number (2514814848).

Almost surely, 2^20002100221 is an apocalyptic number.

It is an amenable number.

20002100221 is a deficient number, since it is larger than the sum of its proper divisors (116418563).

20002100221 is a wasteful number, since it uses less digits than its factorization.

20002100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32651.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20002100221 its reverse (12200120002), we get a palindrome (32202220223).

The spelling of 20002100221 in words is "twenty billion, two million, one hundred thousand, two hundred twenty-one".