2100010221 has 48 divisors (see below), whose sum is σ = 3375687744. Its totient is φ = 1252081152.

The previous prime is 2100010189. The next prime is 2100010223. The reversal of 2100010221 is 1220100012.

It is not a de Polignac number, because 2100010221 - 2⁵ = 2100010189 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2100010223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 239110 + ... + 247736.

It is an arithmetic number, because the mean of its divisors is an integer number (70326828).

Almost surely, 2^2100010221 is an apocalyptic number.

It is an amenable number.

2100010221 is a deficient number, since it is larger than the sum of its proper divisors (1275677523).

2100010221 is a wasteful number, since it uses less digits than its factorization.

2100010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8730 (or 8727 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 2100010221 is about 45825.8684696755. The cubic root of 2100010221 is about 1280.5812425714.

Adding to 2100010221 its reverse (1220100012), we get a palindrome (3320110233).

The spelling of 2100010221 in words is "two billion, one hundred million, ten thousand, two hundred twenty-one".