213221310233 has 4 divisors (see below), whose sum is σ = 215920314240. Its totient is φ = 210522306228.

The previous prime is 213221310209. The next prime is 213221310257. The reversal of 213221310233 is 332013122312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (213221310209) and next prime (213221310257).

It is a cyclic number.

It is not a de Polignac number, because 213221310233 - 2¹⁰ = 213221309209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213221310199 and 213221310208.

It is not an unprimeable number, because it can be changed into a prime (213221330233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1349501885 + ... + 1349502042.

It is an arithmetic number, because the mean of its divisors is an integer number (53980078560).

Almost surely, 2^213221310233 is an apocalyptic number.

It is an amenable number.

213221310233 is a deficient number, since it is larger than the sum of its proper divisors (2699004007).

213221310233 is an equidigital number, since it uses as much as digits as its factorization.

213221310233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2699004006.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 213221310233 its reverse (332013122312), we get a palindrome (545234432545).

The spelling of 213221310233 in words is "two hundred thirteen billion, two hundred twenty-one million, three hundred ten thousand, two hundred thirty-three".