2303212221 has 12 divisors (see below), whose sum is σ = 3364243740. Its totient is φ = 1518221760.

The previous prime is 2303212213. The next prime is 2303212237. The reversal of 2303212221 is 1222123032.

2303212221 is a `hidden beast` number, since 230 + 3 + 212 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1480325625 + 822886596 = 38475^2 + 28686^2 .

It is not a de Polignac number, because 2303212221 - 2³ = 2303212213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2303212194 and 2303212203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2303212201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1436910 + ... + 1438511.

It is an arithmetic number, because the mean of its divisors is an integer number (280353645).

Almost surely, 2^2303212221 is an apocalyptic number.

It is an amenable number.

2303212221 is a deficient number, since it is larger than the sum of its proper divisors (1061031519).

2303212221 is a wasteful number, since it uses less digits than its factorization.

2303212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2875516 (or 2875513 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 2303212221 is about 47991.7932671827. The cubic root of 2303212221 is about 1320.6203506304.

Adding to 2303212221 its reverse (1222123032), we get a palindrome (3525335253).

It can be divided in two parts, 23032 and 12221, that added together give a palindrome (35253).

The spelling of 2303212221 in words is "two billion, three hundred three million, two hundred twelve thousand, two hundred twenty-one".