210120100221 has 8 divisors (see below), whose sum is σ = 280241188864. Its totient is φ = 140039539200.

The previous prime is 210120100207. The next prime is 210120100243. The reversal of 210120100221 is 122001021012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 210120100221 - 2¹⁰ = 210120099197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210120100197 and 210120100206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (210120100321) 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, 10119805 + ... + 10140546.

It is an arithmetic number, because the mean of its divisors is an integer number (35030148608).

Almost surely, 2^210120100221 is an apocalyptic number.

It is an amenable number.

210120100221 is a deficient number, since it is larger than the sum of its proper divisors (70121088643).

210120100221 is a wasteful number, since it uses less digits than its factorization.

210120100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20263811.

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

Adding to 210120100221 its reverse (122001021012), we get a palindrome (332121121233).

The spelling of 210120100221 in words is "two hundred ten billion, one hundred twenty million, one hundred thousand, two hundred twenty-one".