12921011 has 2 divisors, whose sum is σ = 12921012. Its totient is φ = 12921010.

The previous prime is 12921001. The next prime is 12921049. The reversal of 12921011 is 11012921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12921011 - 2¹⁰ = 12919987 is a prime.

It is not a weakly prime, because it can be changed into another prime (12921001) 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, 6460505 + 6460506.

It is an arithmetic number, because the mean of its divisors is an integer number (6460506).

Almost surely, 2^12921011 is an apocalyptic number.

12921011 is a deficient number, since it is larger than the sum of its proper divisors (1).

12921011 is an equidigital number, since it uses as much as digits as its factorization.

12921011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 12921011 is about 3594.5807822332. The cubic root of 12921011 is about 234.6562712857.

Adding to 12921011 its reverse (11012921), we get a palindrome (23933932).

The spelling of 12921011 in words is "twelve million, nine hundred twenty-one thousand, eleven".