213303021309 has 12 divisors (see below), whose sum is σ = 352119273376. Its totient is φ = 121887440712.

The previous prime is 213303021307. The next prime is 213303021343. The reversal of 213303021309 is 903120303312.

213303021309 is a `hidden beast` number, since 2 + 1 + 330 + 3 + 0 + 21 + 309 = 666.

It is not a de Polignac number, because 213303021309 - 2¹ = 213303021307 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213303021307) 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, 1692881059 + ... + 1692881184.

Almost surely, 2^213303021309 is an apocalyptic number.

It is an amenable number.

213303021309 is a deficient number, since it is larger than the sum of its proper divisors (138816252067).

213303021309 is a wasteful number, since it uses less digits than its factorization.

213303021309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3385762256 (or 3385762253 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 27.

The spelling of 213303021309 in words is "two hundred thirteen billion, three hundred three million, twenty-one thousand, three hundred nine".