12213312231 has 32 divisors (see below), whose sum is σ = 17106242560. Its totient is φ = 7744149504.

The previous prime is 12213312173. The next prime is 12213312247. The reversal of 12213312231 is 13221331221.

It is not a de Polignac number, because 12213312231 - 2¹⁹ = 12212787943 is a prime.

It is a super-2 number, since 2×12213312231² (a number of 21 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 = 12213312198 and 12213312207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213310231) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 735735 + ... + 752151.

It is an arithmetic number, because the mean of its divisors is an integer number (534570080).

Almost surely, 2^12213312231 is an apocalyptic number.

12213312231 is a deficient number, since it is larger than the sum of its proper divisors (4892930329).

12213312231 is a wasteful number, since it uses less digits than its factorization.

12213312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16615.

The product of its digits is 432, while the sum is 21.

Adding to 12213312231 its reverse (13221331221), we get a palindrome (25434643452).

The spelling of 12213312231 in words is "twelve billion, two hundred thirteen million, three hundred twelve thousand, two hundred thirty-one".