12213013231 has 4 divisors (see below), whose sum is σ = 12931425792. Its totient is φ = 11494600672.

The previous prime is 12213013217. The next prime is 12213013247. The reversal of 12213013231 is 13231031221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13231031221 = 23 ⋅575262227.

It is a cyclic number.

It is not a de Polignac number, because 12213013231 - 2¹⁵ = 12212980463 is a prime.

It is a super-2 number, since 2×12213013231² (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 = 12213013199 and 12213013208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12213013261) 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, 359206255 + ... + 359206288.

It is an arithmetic number, because the mean of its divisors is an integer number (3232856448).

Almost surely, 2^12213013231 is an apocalyptic number.

12213013231 is a deficient number, since it is larger than the sum of its proper divisors (718412561).

12213013231 is an equidigital number, since it uses as much as digits as its factorization.

12213013231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718412560.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 12213013231 its reverse (13231031221), we get a palindrome (25444044452).

The spelling of 12213013231 in words is "twelve billion, two hundred thirteen million, thirteen thousand, two hundred thirty-one".