12321137 has 2 divisors, whose sum is σ = 12321138. Its totient is φ = 12321136.

The previous prime is 12321131. The next prime is 12321149. The reversal of 12321137 is 73112321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9634816 + 2686321 = 3104^2 + 1639^2 .

It is a cyclic number.

It is not a de Polignac number, because 12321137 - 2⁴ = 12321121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12321131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6160568 + 6160569.

It is an arithmetic number, because the mean of its divisors is an integer number (6160569).

Almost surely, 2^12321137 is an apocalyptic number.

It is an amenable number.

12321137 is a deficient number, since it is larger than the sum of its proper divisors (1).

12321137 is an equidigital number, since it uses as much as digits as its factorization.

12321137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 252, while the sum is 20.

The square root of 12321137 is about 3510.1477176894. The cubic root of 12321137 is about 230.9671748614.

Adding to 12321137 its reverse (73112321), we get a palindrome (85433458).

The spelling of 12321137 in words is "twelve million, three hundred twenty-one thousand, one hundred thirty-seven".