12311213 has 8 divisors (see below), whose sum is σ = 13079232. Its totient is φ = 11548096.

The previous prime is 12311209. The next prime is 12311219. The reversal of 12311213 is 31211321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12311213 - 2² = 12311209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12311219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4856 + ... + 6942.

It is an arithmetic number, because the mean of its divisors is an integer number (1634904).

Almost surely, 2^12311213 is an apocalyptic number.

It is an amenable number.

12311213 is a deficient number, since it is larger than the sum of its proper divisors (768019).

12311213 is a wasteful number, since it uses less digits than its factorization.

12311213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2451.

The product of its digits is 36, while the sum is 14.

The square root of 12311213 is about 3508.7338172053. The cubic root of 12311213 is about 230.9051477419.

Adding to 12311213 its reverse (31211321), we get a palindrome (43522534).

The spelling of 12311213 in words is "twelve million, three hundred eleven thousand, two hundred thirteen".