12231213 has 8 divisors (see below), whose sum is σ = 16325088. Its totient is φ = 8145744.

The previous prime is 12231203. The next prime is 12231227. The reversal of 12231213 is 31213221.

12231213 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12231213 - 2²² = 8036909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12231192 and 12231201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12231203) 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, 3231 + ... + 5907.

It is an arithmetic number, because the mean of its divisors is an integer number (2040636).

Almost surely, 2^12231213 is an apocalyptic number.

It is an amenable number.

12231213 is a deficient number, since it is larger than the sum of its proper divisors (4093875).

12231213 is a wasteful number, since it uses less digits than its factorization.

12231213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4203.

The product of its digits is 72, while the sum is 15.

The square root of 12231213 is about 3497.3151130546. The cubic root of 12231213 is about 230.4039090471.

Adding to 12231213 its reverse (31213221), we get a palindrome (43444434).

The spelling of 12231213 in words is "twelve million, two hundred thirty-one thousand, two hundred thirteen".