210102100221 has 16 divisors (see below), whose sum is σ = 302525435520. Its totient is φ = 128933442240.

The previous prime is 210102100213. The next prime is 210102100223. The reversal of 210102100221 is 122001201012.

It is not a de Polignac number, because 210102100221 - 2³ = 210102100213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 210102100197 and 210102100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210102100223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7489110 + ... + 7517111.

It is an arithmetic number, because the mean of its divisors is an integer number (18907839720).

Almost surely, 2^210102100221 is an apocalyptic number.

It is an amenable number.

210102100221 is a deficient number, since it is larger than the sum of its proper divisors (92423335299).

210102100221 is a wasteful number, since it uses less digits than its factorization.

210102100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15006596.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 210102100221 its reverse (122001201012), we get a palindrome (332103301233).

The spelling of 210102100221 in words is "two hundred ten billion, one hundred two million, one hundred thousand, two hundred twenty-one".