213221232231223 has 4 divisors (see below), whose sum is σ = 213221517701400. Its totient is φ = 213220946761048.

The previous prime is 213221232231221. The next prime is 213221232231289. The reversal of 213221232231223 is 322132232122312.

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 213221232231223 - 2¹ = 213221232231221 is a prime.

It is a super-2 number, since 2×213221232231223² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213221232231221) 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, 141611773 + ... + 143109526.

It is an arithmetic number, because the mean of its divisors is an integer number (53305379425350).

Almost surely, 2^{213221232231223} is an apocalyptic number.

213221232231223 is a deficient number, since it is larger than the sum of its proper divisors (285470177).

213221232231223 is an equidigital number, since it uses as much as digits as its factorization.

213221232231223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285470176.

The product of its digits is 20736, while the sum is 31.

Adding to 213221232231223 its reverse (322132232122312), we get a palindrome (535353464353535).

The spelling of 213221232231223 in words is "two hundred thirteen trillion, two hundred twenty-one billion, two hundred thirty-two million, two hundred thirty-one thousand, two hundred twenty-three".