12141721 has 2 divisors, whose sum is σ = 12141722. Its totient is φ = 12141720.

The previous prime is 12141713. The next prime is 12141733. The reversal of 12141721 is 12714121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9030025 + 3111696 = 3005^2 + 1764^2 .

It is a cyclic number.

It is not a de Polignac number, because 12141721 - 2³ = 12141713 is a prime.

It is not a weakly prime, because it can be changed into another prime (12141761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6070860 + 6070861.

It is an arithmetic number, because the mean of its divisors is an integer number (6070861).

Almost surely, 2^12141721 is an apocalyptic number.

It is an amenable number.

12141721 is a deficient number, since it is larger than the sum of its proper divisors (1).

12141721 is an equidigital number, since it uses as much as digits as its factorization.

12141721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 112, while the sum is 19.

The square root of 12141721 is about 3484.4972377662. The cubic root of 12141721 is about 229.8406015919.

Adding to 12141721 its reverse (12714121), we get a palindrome (24855842).

The spelling of 12141721 in words is "twelve million, one hundred forty-one thousand, seven hundred twenty-one".