12261213 has 40 divisors (see below), whose sum is σ = 19979520. Its totient is φ = 7464960.

The previous prime is 12261211. The next prime is 12261253. The reversal of 12261213 is 31216221.

It is not a de Polignac number, because 12261213 - 2¹ = 12261211 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 47581 + ... + 47837.

It is an arithmetic number, because the mean of its divisors is an integer number (499488).

Almost surely, 2^12261213 is an apocalyptic number.

It is an amenable number.

12261213 is a deficient number, since it is larger than the sum of its proper divisors (7718307).

12261213 is a wasteful number, since it uses less digits than its factorization.

12261213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 310 counting only the distinct ones).

The product of its digits is 144, while the sum is 18.

The square root of 12261213 is about 3501.6014907468. The cubic root of 12261213 is about 230.5921289657.

Adding to 12261213 its reverse (31216221), we get a palindrome (43477434).

The spelling of 12261213 in words is "twelve million, two hundred sixty-one thousand, two hundred thirteen".