210001100221 has 8 divisors (see below), whose sum is σ = 236991837600. Its totient is φ = 184326984240.

The previous prime is 210001100203. The next prime is 210001100227. The reversal of 210001100221 is 122001100012.

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 210001100221 - 2⁵ = 210001100189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210001100198 and 210001100207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210001100227) 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, 329155011 + ... + 329155648.

It is an arithmetic number, because the mean of its divisors is an integer number (29623979700).

Almost surely, 2^210001100221 is an apocalyptic number.

It is an amenable number.

210001100221 is a deficient number, since it is larger than the sum of its proper divisors (26990737379).

210001100221 is a wasteful number, since it uses less digits than its factorization.

210001100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658310699.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 210001100221 its reverse (122001100012), we get a palindrome (332002200233).

The spelling of 210001100221 in words is "two hundred ten billion, one million, one hundred thousand, two hundred twenty-one".