213321333323231 has 4 divisors (see below), whose sum is σ = 243795809512272. Its totient is φ = 182846857134192.

The previous prime is 213321333323191. The next prime is 213321333323237. The reversal of 213321333323231 is 132323333123312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 213321333323231 - 2³⁸ = 213046455416287 is a prime.

It is a super-2 number, since 2×213321333323231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213321333323191 and 213321333323200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213321333323237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15237238094510 + ... + 15237238094523.

It is an arithmetic number, because the mean of its divisors is an integer number (60948952378068).

Almost surely, 2^{213321333323231} is an apocalyptic number.

213321333323231 is a deficient number, since it is larger than the sum of its proper divisors (30474476189041).

213321333323231 is an equidigital number, since it uses as much as digits as its factorization.

213321333323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30474476189040.

The product of its digits is 104976, while the sum is 35.

Adding to 213321333323231 its reverse (132323333123312), we get a palindrome (345644666446543).

The spelling of 213321333323231 in words is "two hundred thirteen trillion, three hundred twenty-one billion, three hundred thirty-three million, three hundred twenty-three thousand, two hundred thirty-one".