2103212221 has 8 divisors (see below), whose sum is σ = 2302581888. Its totient is φ = 1905204000.

The previous prime is 2103212213. The next prime is 2103212261. The reversal of 2103212221 is 1222123012.

It is a happy number.

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 2103212221 - 2³ = 2103212213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2103212195 and 2103212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2103212261) 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, 337125 + ... + 343306.

It is an arithmetic number, because the mean of its divisors is an integer number (287822736).

Almost surely, 2^2103212221 is an apocalyptic number.

It is an amenable number.

2103212221 is a deficient number, since it is larger than the sum of its proper divisors (199369667).

2103212221 is a wasteful number, since it uses less digits than its factorization.

2103212221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680723.

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2103212221 is about 45860.7917615909. The cubic root of 2103212221 is about 1281.2317693825.

Adding to 2103212221 its reverse (1222123012), we get a palindrome (3325335233).

The spelling of 2103212221 in words is "two billion, one hundred three million, two hundred twelve thousand, two hundred twenty-one".