2203212321 has 12 divisors (see below), whose sum is σ = 3192589348. Its totient is φ = 1464113664.

The previous prime is 2203212307. The next prime is 2203212337. The reversal of 2203212321 is 1232123022.

2203212321 is a `hidden beast` number, since 2 + 20 + 321 + 2 + 321 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 2184627600 = 4311^2 + 46740^2 .

It is not a de Polignac number, because 2203212321 - 2¹⁵ = 2203179553 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2203212294 and 2203212303.

It is not an unprimeable number, because it can be changed into a prime (2203212301) 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, 388240 + ... + 393873.

Almost surely, 2^2203212321 is an apocalyptic number.

It is an amenable number.

2203212321 is a deficient number, since it is larger than the sum of its proper divisors (989377027).

2203212321 is a wasteful number, since it uses less digits than its factorization.

2203212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782432 (or 782429 counting only the distinct ones).

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

The square root of 2203212321 is about 46938.3885641593. The cubic root of 2203212321 is about 1301.2241567618.

Adding to 2203212321 its reverse (1232123022), we get a palindrome (3435335343).

The spelling of 2203212321 in words is "two billion, two hundred three million, two hundred twelve thousand, three hundred twenty-one".