12111213 has 8 divisors (see below), whose sum is σ = 16308576. Its totient is φ = 7994000.

The previous prime is 12111199. The next prime is 12111217. The reversal of 12111213 is 31211121.

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 12111213 - 2⁶ = 12111149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111217) 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, 19683 + ... + 20288.

It is an arithmetic number, because the mean of its divisors is an integer number (2038572).

Almost surely, 2^12111213 is an apocalyptic number.

It is an amenable number.

12111213 is a deficient number, since it is larger than the sum of its proper divisors (4197363).

12111213 is a wasteful number, since it uses less digits than its factorization.

12111213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40075.

The product of its digits is 12, while the sum is 12.

The square root of 12111213 is about 3480.1168083845. The cubic root of 12111213 is about 229.6479364777.

Adding to 12111213 its reverse (31211121), we get a palindrome (43322334).

It can be divided in two parts, 1211121 and 3, that multiplied together give a palindrome (3633363).

The spelling of 12111213 in words is "twelve million, one hundred eleven thousand, two hundred thirteen".